Mysterious Japanese Joinery

[@Richard.Dawson]

It is so refreshing to see that there are still channels like this one on YT. The YT "woodworking" genre has turned into mostly ikea type furniture. Seems like a majority of all the "woodworking" channels on YT now "assemble" basic furniture, using the simplest joinery possible. While they all try way too hard to be funny (& fail) & their main priorities are advertising for sponsors & churning out as many videos as possible. I really appreciate your content & it's great to be able to learn new skills from you. It's great to see that there are still actual woodworkers that care about the craftsmanship that goes into their work. I can guarantee that this one joint took longer to create than an entire piece of furniture would take from most of the popular YTers. No screws, no mdf, no pocketholes, no CNC. Just sharp chisels, wood, time, patience & pride in your work. Great stuff!

[@dylaniwakuni]

Thanks 😊

[@streikkk]

you are right. there should be a "no bullshit" filter on YT. this channel would pass for sure !

[@fluchterschoen]

*I challenge you to name a piece of furniture that blends the aesthetic, carpentry, joinery, surface finish and ease-of-transport half as well as the IKEA Lack.*

[@KansaSCaymanS]

Wow, the satisfaction you get just watching the joint come together! Beautiful work.

[@Stone_624]

The crazy thing about this is that Osaka Castle was built in late 1500's (Finished construction in 1598 after 15 years of construction). The Tokugawa Shogunate took over the castle in 1615, and rebuilt the Main Gate (which sustained damage in the takeover) in 1628. The main gate has remained to this day. That means this joint was either originally used in the 1580's or 1590's by a guy named Toyotomi HIdeyoshi (豊臣 秀吉), Or in 1628 / 1629 by a guy named Tokugawa Hidetada (徳川 秀忠) . PS : I'm always blown away at Japanese recordkeeping how easily we can look up and find this kind of stuff.

[@badstate]

I would bet it was part of the repair phase. As cool as the joinery is, it would be a strange thing to do during original construction, but an elegant way to fix a broken post.

[@goldenn1086]

The whole forbidden city in Beijing was built with with these skills 600 years ago. And these are traditional Chinese woodworking skills. Not Japanese

[@Stone_624]

​@@goldenn1086 So you're saying the Japanese, Who had cultural, economic, and political interactions with the Chinese for more than 1500 years, May have learned skills and techniques from the Chinese sometime in the 1000 Years prior to building this? No Sh*t Sherlock. Japanese have been building Buildings in Japan since before 1100, as I'm sure China did as well. Japanese craftsmen building Japanese buildings don't have to credit the skills the Chinese may have shared hundreds of years prior. The trade went both ways.

[@kingsbarns1]

@@goldenn1086 Prove it !! Is there any drawing or photo?

[@fluchterschoen]

*So you're basically saying we've no idea when or by whom this joint was first used?*

[@carbonerd5935]

The Japanese craftsmanship is just insane. Can’t believe people back in more than 400 years ago invented those skills. It’s 2021 and people still struggle to understand and figure out how they did it.

[@Zie_carpentry]

Hello friend 😊👍

[@jlongmasbartholomew]

I, Nephi, having been born of goodly parents, therefore I was taught somewhat in all the learning of my father; and having seen many afflictions in the course of my days, nevertheless, having been highly favored of the Lord in all my days; yea, having had a great knowledge of the goodness and the mysteries of God, therefore I make a record of my proceedings in my days. Yea, I make a record in the language of my father, which consists of the learning of the Jews and the language of the Egyptians. And I know that the record which I make is true; and I make it with mine own hand; and I make it according to my knowledge". 1 Nephi 1-3 Hello friends, I am a member of The Church of Jesus Christ of Latter-Day Saints. The verses above are the first three verses in The Book of Mormon. I know this probably isn't the most ideal place to talk about religion but I really do want you to know that God loves you. You may not love Him or care about Him at all, but He still will continue to love you. You are a beloved son or daughter of God. He knows you personally and He truly and deeply desires for your happiness. He loves everyone who has every lived on this earth, with a perfect equal love regardless of their race, gender, ethnicity, faith and values and beliefs. The Lord loves you more than you can think or comprehend. "He inviteth them all to come unto him and partake of his goodness; and he denieth none that come unto him, black and white, bond and free, male and female; and he remembereth the heathen; and all are alike unto God, both Jew and Gentile" 2 Nephi. He is our loving Heavenly Father. We are literally His children and creations. When we were in the womb, he knew about us" Jerimiah 4:5. He knitted us and we were created in His image. I testify to you that you and I are not a mistake. He knows the very moment when we stand and when we sit. He is familiar with all our ways and knows us personally who we are. The hairs on our very head are numbered. God loved us so much, He sent His Only Begotten Son for us, that we may be able to return and dwell in the presence of God again. The Lord has not forgotten about us even when it feels like He has. He will never forsake us. When we are happy, He and His angels rejoice alongside us. When we are sad, He heals us and lifts us up from our trials. He has always been there for us. He has always been our loving, compassionate Heavenly Father and God. Will we always be His children and people? I testify to you that God lives and that Jesus is the Christ. Both love you exceedingly and rejoice when you are happy. They both love you so much. They love you with a love unfeigned. They will never ever stop doing good unto you. I know that The Book of Mormon is true. "And when ye shall receive these things, I would exhort you that ye would ask God, the Eternal Father, in the name of Christ, if these things are not true; and if ye shall ask with a sincere heart, with real intent, having faith in Christ, he will manifest the truth of it unto you, by the power of the Holy Ghost". Moroni 10:4 I promise and testify to you, that if you will read The Book of Mormon, ponder on its message and ask God if it is not true, you will come to know of its truthfulness, whether its true or not true. Remember my friends that God loves you with all his heart, might mind, soul and strength. He wants you to be happy. He knows what you are going through and dealing with right now. He desires for you to return back to Him. Unfortunately, He has been misrepresented and seen as a cruel and angry God who anticipates for us to slip and writes down every mistake we make waiting to punish us by those who do not know or know Him fully. My friends, God has stored many opportunities and blessings for you. He is incredibly eager and desires with all His heart to bless you abundantly. He wants you to live with Him again. He wants to experience everlasting joy and indescribable happiness in this life and in the life to come. He wants you to partake of His goodness and come and follow Him. The Lord does not care how early or late you decide to come unto Him. I testify to you that if you have strayed and wondered off the path that there is hope in Jesus Christ, The Savior of the world. The Lord accepts those who come unto Him whether your early, late or just in time who desire to change. The Lord will accept you wholeheartedly and forgive you if you are willing to change. The Lord will welcome you and will always be ready to embrace you with open arms. The Lord will lift us up in our trials and use us to bless the lives of those around us if we are willing to change. If you desire to learn more, you are always welcome to visit comeuntochrist.org. There you will learn more about The Church of Jesus Christ and our core beliefs and values. If you have taken the time to read The Book of Mormon and this comment, thank you. It takes a huge leap of faith and a lot of courage to muster enough faith to read in the Book of Mormon and to believe in something in a personage that you may never see in this lifetime. Although we may not be able to see God and Jesus Christ in this life, I testify to you that they are real. They do truly exist. I promise you that if you will pray to know of their existence, you will come to know whether they exist or have been made up. Remember that The Lord is always available to talk to through prayer 24/7. No question sounds too silly for Him. James wrote, "If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him" James 1:5. If you must know whether or not something is true or evil and deceptive, you can always pray to God. He will help you know what the truth is and what is not true. He will never be too busy to talk to. He will give you strength you need to overcome your temptations and will give you the strength you need to endure through your trials and afflictions. Paul said that The Lord will not give you temptations that you cannot resist, but that in your temptations, He will provide a way for you to resist and overcome them. He will provide a way. He wants to bless you and reward you abundantly. The Lord knows you and will not forget you. You are loved. You are utterly amazing. You have incredible potential. You are not forgotten or ever will be forsaken. You are special. You are unique. You have been reserved for this time and The Lord needs you on His side. It simply would not be the same without you. Thank you for your time.

[@may-ky6jl]

The company called Kongo Gumi is around 1500 years old. This company was set up for maintaining the Horyu Ji Temple in Nara Japan. This company is carrying those skills upto this day. More than 20 companies are like this companies older than 1200 years old and 20,000 companies are older than hundreds years old in Japan.

[@tian3127]

This technique was invented much earlier than 400 years ago, and it was spread from China to other Asian countries including Japan. The usage of this technique in ancient Chinese furnitures and architectures was on the next level but it’s sad people hardly know about it and have no opportunity to see real fascinating ancient techniques.

[@goldenn1086]

Japanese invented it? It's invented in China thousands of years ago.

[@HabuTaizan]

The Japanese Castle and Shrine do not use nails. There are sill special carpenter call 'MiyaDaiku' that makes wonderful Japanese construction without using the nails. This is one of the Vertical Joints. Dylan made awesome job, and ask your favor to update with several wood joint technics still exist in Japan.

[@may-ky6jl]

There is one of Miyadaiku company called Kongo Gumi which is oldest company in the world. Set up around 1500 years ago for maintaining temple called Horyu Gi in Nara. More than 20 companies are more than 1000 years old and 20,000 companies are old as 100 years old in Japan.

[@ФеофанЭтополедолжнобытьзаполне]

This is basic stuff. Almost every nation (and certanly every civilization) built a lot of huge things from wood without nails. Hell, my two story house has only 36 nails, 6 nails per door.

[@d.Cog420]

@@ФеофанЭтополедолжнобытьзаполне This is great stuff. Almost every nation (and certanly every civilization) built a lot of huge things from wood without nails and it's great to see traditions kept alive. I'm totally with it too, my two story house has only 36 nails, 6 nails per door. Keep up the good posts teaching next generations the skill and pride you get from simple tools, knowledge and time.

[@maggieling6578]

Ya, because they stole this technique from China

[@d.Cog420]

@@maggieling6578 The technique is much older than China. The mortise and tenon joint is an ancient joint dating back 7,000 years. The first examples, tusked joints, were found in a well near Leipzig - the world's oldest intact wooden architecture.

[@iggysixx]

That is a beautiful combination of a complex design, and a simple (and very effective) way to put it together. What I particularly like (since I think it's a vertical supporting beam), is that it takes downward force to push it in place... In case of holding up a roof, the joint can ONLY stay strong and in place. (It's reminds me a bit of construction wood that has been 'finger-jointed' together. That's where the ends of smaller pieces of wood are made 'pointy', and then are pushed together and glued in place. To make 1 long piece of straight pole. That is done in factories, though. And the joints are made to be invisible. To give the illusion to the customer / carpenter that it's 1 piece they are buying) What I like about Japan, is that this wood joint was considered important enough historically to investigate it with x-rays.

[@skwalka6372]

Actually, an axial (downward) force will not bring the two pieces together. The force must have both a transversal and an axial component, and this is the reason why the X-ray visualization was needed, this is a lot more complex than it looks. What is incredible in many of these joints is that the Japanese carpenters managed to figure them out without the aid of descriptive geometry, the branch of math that modern CAD system use.

[@iggysixx]

@@skwalka6372 I understand what you mean with the transversal + axial force. HOWEVER (he argued with the actual knowledgeable person ;))... In the video it seems like only 'axial force' is applied (by hammering). And the shape of the joint seems to facilitate the 'transversal' movement (or eh.. 'The geometry of the joint converts the axial force into transversal force' or something similarly scientific sounding). Because he's hammering on axis. (And that causes the piece to slide diagonally into the other piece) Unless I'm getting something completely wrong, I think my original description might be accurate still.. (?) (Though most likely I was using the wrong terminology.. Still feels accurate to me; downward force pushes the joint together.. Albeit by converting part of that force into diagonal force). - As for your amazement; that's what I love too. This is all without fancy tools and computers :) What I think might have been part of the process of designing these, is something like Escher did with his repeating patterns, that morph from one shape into another as the pattern goes on. The basis of designing those, was simply "taking a square, then take away a bite out of one side, then stick that bite on the other side". And then continuing until you get a complex shape that is able to tile perfectly. Seems to me like a logical way to arrive at certain complex joints. (But I could very well be wrong, of course. Just thought I'd share my thoughts on that :)) Also, thanks for the terminology update: 'descriptive geometry'. I've never gotten into CAD, but I feel like it's something that could be benefitial. (I know my way around Illustrator, and I've done some mild 3D animation years ago (in cinema 4D I think). CAD seems like something cooler, though. Since you can basically design things that can be made into actual objects, instead of things on your screen or on paper. Dumb question; 3D printing... Is that done with CAD too..? (Or 'something similar but not CAD'). Never got the chance to do anything with that yet. No idea where to start (:

[@skwalka6372]

@@iggysixx The last few seconds of the video as he assembles the joint shows the joint being closed with axial hammer blows. However, most of the assembly (look at time about 6:10 on) is done without hammering. The reason is that when the assembly begins, axial hammering would cause friction forces to slightly deform the joint surface, making the closing movement hard or impossible. At the start of the assembly, he is holding the upper component with his hand(s) and pushing it laterally, supplying the lateral force component I mentioned. When the joint is almost closed, the bearing surfaces are larger and you can proceed with the hammer. Descriptive geometry (an advanced version of it) gives you the math infrastructure to calculate these shapes, 3D printing uses it as do all the computer functions you use in animation.

[@iggysixx]

@@skwalka6372 A belated 'thank you' for the extra schooling session :) It's actually very helpful to understand the terminology of mechanics a little better, as well as gain some insight into how stuff works. Last question; Once the joint is seated properly / has been fully hammered in place... And it's holding up a roof or something.. From that point on, it would be true to say that the 'axial force' / downward force will at least 'keep it in place', right? (Since it would require upward + sideways force fo get it apart again)

[@skwalka6372]

@@iggysixx If done correctly (meaning the tolerances are right), this joint should be self-centering and self-tightening once it is assembled. No need to apply any additional forces to keep in place. It will resist both tensile and compressive forces as well as rotational torque. Whoever invented this joint was an extremely clever person. =)

[@jimh3362]

THAT is so amazing!!! I could not figure out how that fit together until they showed us.

[@swamppifi6186]

That is clever, the joint is taking advantage of timber strength in compression. it will never come apart when a load is applied.

[@johnarnold893]

Doesn't do too well in earthquakes though.

[@DerekBlais]

What's really awesome about this was that it was a mystery to most people until 1983. The craftsmen of the past were really special. Thanks for sharing this with us, Dylan.

[@dylaniwakuni]

Cheers! Indeed, the work they did were really special!

[@Zie_carpentry]

👏👏👏

[@xl000]

I doubt it. By looking at the outline of the joints, you can immediately deduce how it looks pn the inside, because the two pieces only move in a straight line in order to close the joint. All you need to do is draw straight lines from the outline and figure the direction.

[@masoudj1185]

@@xl000 You don't know what you don't know. It's not that simple. Now that You've seen this video it looks easy but looking from outside it's almost impossible to know how the internal sections interlock. The first person who came up with this idea was a genius. Not in wood working but in geometry.

[@christopherbedford9897]

@@xl000 That's an incredibly glib response. Try not to be so smug, it's not winning you any friends.

[@alleywoop49]

これは婆娑羅継と言って、足元が腐っても交換しやすいように初めから継ぎ手を造って建てることが多いですね。下になる材料は腐りにくい栗などを使うと良いです。

[@Hutch5321]

I don't know if it gets any better than this. Thank you, Dylan, for sharing this with us. Extraordinary!

[@dylaniwakuni]

Happy to hear that, thank you 😊

[@sandrawest2105]

I am mesmerized watching the perfection of saw and chisels in your hands.. Your work is so perfect that complicated pieces just slide into each other and lock. Perfectly cut and clean corners, wafer thin slices of wood…I could go on and on. Thank you. Peace 💫

[@dylaniwakuni]

That is great to hear. Thank you for your kind comment 😊

[@shirow2m]

仕組み自体も凄いですが、この継ぎ手に至った過程が知りたいですね！ 先人達はどうやってこの継ぎ手を編み出したのか、とても気になります。

[@ftswarbill]

それは私も知りたい非常に良い質問です。

[@chandlerbing3290]

This is a woodworking technology invented in China. It was used as early as 7000 years ago and was introduced into Japan later

[@hitachiyamto4392]

@@chandlerbing3290 凄いね。チャイナでは石器時代に、こんな複雑な木の加工が出来たんだ。

[@shirow2m]

I don't think there was a country called South Korea at that time.

[@劇団とわのき所属のおるどるてぃ]

簡素なAという細工職人なら誰でも思いつく接続方法に対してその欠点をBで補う。そのAとBを同時採用するためにCという方法を導入する。 それだけです。 逆説的には その方法があり、現場や木の特性、負荷の方向からそのCが採用される事になりますね。 負荷メインが縦のみだからA接続にしよう、ならばBでCだ。ともなりますし、現場でC方法で接続していきたい、となればCの接続方法を採用するには噛み合わせはBとAでどうじゃろ。 となります。

[@ゲーム批評屋1号]

家にある昔作られた稲荷様の扉が壊れたので直そうとしたら木材の各パーツが複雑に組み合わされて作られてて修理するのに難儀した 昔の大工さんの技術は凄い ビスや釘を多用する今のやり方とは違ってる

[@Zie_carpentry]

Hii friend,, check my vdeo 🙏😊

[@lynxg4641]

WOW, absolutely amazing, thanks so much for sharing with us, that is such a cool joint. Was really trying to figure out how it went together after you showed the layout of both pieces and don't think I would have anyways, but the guys scrub planning in the background were so loud it was hard to concentrate LOL

[@Zie_carpentry]

👏👏👏

[@randymiller2460]

Under compression, this joint has a built in stop against slipping apart. It looks like it would interlock well against lateral forces.

[@Ratnoseterry]

Necessary in a land riddled by earthquakes

[@PacesIII]

@@Ratnoseterry Exactly. And it has a built in feature to allow a minor amount of flex for such events.

[@teambellavsteamalice]

At 7:25, the broadest part of the dark wood slides in and seems to fit perfectly at every part of the way. The wide part has the right angles in three directions? It doesn't look like this should be possible! Even worse if one doesn't know this IS possible, how does one conceive of it?! Simply brilliant! At earlier points in the video, this crucial part is even less visible.

[@constantinosschinas4503]

You conceive it when you have absence of insignificant stimulus. Today we are bombarded with all kind of crap, whole day.

[@pigpuke]

It's called "spatial awareness" - the ability to hold a scene in your head and rotate it around to "see" it at different angles and orientations - Men, who as hunters needed this for humans to survive, typically are better at this than women, we are simply "built for it". Similar to men having larger lungs so they can run for longer, it's just a genetic tool for our survival as a species. Fast forward 2 million years to today, we still have this and it proves itself in spades with modern trades and engineering. I daresay, without it, we'd still be filthy animals roaming the savannas of Africa - if we survived at all as a species.

[@k-matsu]

I once found an old (Edo-era) illustrated book on Japanese joinery. There were something like 100 patterns , divided into six varieties, and some were truly mind-boggling. FWIW I live in a 250+-year-old Japanese farmhouse (古民家）and the way the entire structure fits together with no nails at all, just interlocking pegs (well ... there are some nails in the structure, now that its been refurbished) is truly like a form of art.

[@VYORAable]

垂直方向・水平方向には抜けないが、嵌め込む時と同様に「斜め上方向には抜ける」仕組みなんですね。

[@nameno4066]

こういう技法がの昔からあるのも凄いけど、 それをこうして現代でもできるようになるのも凄い

[@tox9544]

繋いだ完成の状態を外から見たら私のような素人には全く分かりませんでした。 毎回驚愕の加工技術に驚かされます。同時に何百年前にから実用されている先人の 発想と技術力にも敬意を払います。

[@Texaca]

よく言ったね先生 -- by Google ✌🏼

[@themtube9455]

All due respect for the amazing workmanship. Makes me want to go level up on my carpentry skills. I't one thing to know how to make a joint like that, it's a completely different story to actually get it to fit nice ans snug. I tip my hat to you Sir.

[@石動恭介]

この手の接手はどちらが雄とも雌とも言えないところが一体を現わしていて美しいですね。

[@Zie_carpentry]

Excuseme 🤝🙏

[@huben54]

それが宗教観みたいなところある。

[@danondler8808]

An amazing joint! Thank you for sharing, I don't think I would have figured it out if not shown. An obvious sign of master carpentry to make a joint last so long in a high wear use.

[@ボン太丸]

やはり技術がある方は道具も綺麗ですね メンテナンスが行き届いている

[@揚げ浸し-y1c]

本当にそうですよね　特に鑿の美しさには感動しました

[@poison03218241]

大工さんに限らず、機械関係とかでも、施工者の道具や、工具箱はその職人さんのレベルを映すものだと思っています。

[@rei34057]

手入れが行き届いてて使い古された道具も味があっていいよね

[@bluesteel7874]

Props to the guy that came up with this joint, must've been one good craftsman.

[@chibineo24]

Bet you a dollar he was trying to trick his friends in the trade

[@chrissilverhand1]

So skilful, but also soothing, like meditation.

[@ark1200]

Such a joy to see this joinery made in perfection. I've made it several times, but never nearly as good as yours.

[@dylaniwakuni]

Great to hear that, cheers! 😊🙌

[@tyronevaldez-kruger5313]

I tried it once and I understood right away that gluing is my talent. Good Lord it needs enormous precision and a steady hand. It's amazing though

[@TheXaimaca]

Respect for tradition, imagination, precision. I am an Italian cabinetmaker and I see great similarities with your way of working. Congratulations.

[@Cornelius429]

Such beautiful craftsmanship, an absolute pleasure to see this. Thank you.

[@lonewolf4949]

Your replica of this joinery is simply amazing and you very skilled. The Carpenter who came up with this originally is simply a genius

[@シャークロック鮫鰐]

魅入ってしまった… 昔の発想もだけど、今生きてる技術もまた素晴らしい…

[@amaimonosukiyanen]

ここまで緻密だと効率より「マネできるものならばやってみろ」という 昔の職人の意地や若手への挑戦状みたいなものを感じるね これよりも複雑なのもあるっていうのがヤバいよね

[@erkanun]

"Kündekari" sanatına bak

[@MrCyobitto]

先人との知恵くらべは透視しないとわからなかった。先人の勝ちだね。

[@rei34057]

@@user-nf8yw3wz4g 機械使わなきゃ分からないレベルのやつを機械なんか使わずに頭で考えてた訳だから先人がつよい(？)

[@syousa333]

@@rei34057 機械使って調べた時点で現代人がギブアップした感ありますね。

[@mat_max1636]

こういうのは未来に遺さにゃいかん

[@gogogo502002]

ピッタリ合うのもすごいし、はめる時のやり方にも感銘を受けた。思わずありゃ～（驚　と声が。

[@鬼帝覇王]

お見事 どうやってつなぐのかと思ったら、、、凄すぎて笑ってしまったｗ

[@kamoga_negishotte4267]

日本の木造建築継手技術はこれ以外にもさまざま有るかと思いますがいつも感心されらます。

[@ぶんぶん太郎-v4w]

仕組みがわかったような、わからないような・・・ とにかくすごいのはわかりました。 昔の職人さんは日々仕組みを考えて「どうだ、わかるか」ってお互い自慢しあったっていう話しを聞いたことがあります。 そしてどんどん高度な継ぎ方が生まれたんでしょうね。

[@Dogsnark]

This skill requires a patience and desire for perfection that is increasingly beyond most craftsman in these hurry-up and get done times. I hope, though, there will always be those few who keep the art alive.

[@forest487]

*crafts people

[@mikeroth5536]

Such incredible and beautiful joinery. Thank you for sharing.

[@johnandrebeccamalcolm3895]

Most amazing wood joinery i have ever seen! One slip and the workpiece is ruined. The skill, ability, and imagination to perceive, understand, and create this is beyond my comprehension!!!

[@dylaniwakuni]

Cheers 😊🙌

[@shaney8275]

Very impressive. Made me think about the amount of time, effort, and focus on craftsmanship and beauty of the end product - instead of "production" and how fast we "can get this done".

[@demef758]

Everything about this project is mind-bogglingly complex and beautifully-executed. But what strikes me as even more impressive is whoever dreamed it up in the first place! My mind cannot process how any mortal could have conjured up the joint. And this was long ago, in an era when computers were completely unheard of. Simply brilliant!

[@是醬不是ちゃん]

中国的榫卯结构（Chinese Mortise and tenon）

[@Ratnoseterry]

I imagine the purpose behind the joints is to keep the posts together during an earthquake. Could be wrong though.

[@Ilovecruise]

@@Ratnoseterry no, this technique was developed long long long ago, because back in the days iron nail do not exist/ too expensive.

[@山中義則-h3p]

この動画の継手は、大阪城の大手門控え柱に見られるもので、長らく継ぎ方が分かりませんでした。そこで内部構造の解明が公募されました。したがって、本動画のような継ぎ方だけではなく他の継ぎ方もあります。この動画の方法は神戸在住の棟梁、幸田貢氏の案です。（1979年6月6日「毎日新聞」）1983年X写真によって内部構造が明らかになりました。

[@所長風]

この継手の記事見た事あります、昔の職人さんの技術凄すぎです。

[@rickschuman2926]

One of the things that surprises me about this work is how accurately it is executed but how thick the layout marks are. Most fine work like this is laid out with a very sharp knife but these lines look like a .07mm pen was used. And now, having seen the work done, it still seems impossible; especially this joint.

[@ikkentonda]

I find it interesting that western joinery has one cut on the waste side of a knifed line, while Japanese joinery intends for you to SPLIT an inked line. Traditionally inked with a beveled and feathered piece of bamboo, no less.

[@m.mishima9485]

上から力がかかることで安定するようになってるのか。 昔の人は凄いなぁ。 私にも1985年がやってきたようです。

[@COVID_25e]

元の大阪城のも敢えて違う色の組み合わせで、しかも目立つところに置いてあり、技の不思議さを見せつけていたのですね。

[@user-jq4qz7zh3d]

今の文化財修復ってオリジナルと完璧に同化させるように仕上げるんじゃなくてあえて修復箇所がわかるようにしてるよ。理由は数十年後の再修復のためだったり、今残ってるオリジナルの箇所をできるだけ尊重するために

[@jsullivan2112]

Amazing. Hundreds, if not thousands of years old. And the patience you have for such craftsmanship, really really cool!

[@totalutternutter]

Even after seeing it go together it still looks like an impossible joint.

[@miyonarita8646]

この技術すごいとしか言いようがない。それと小気味よい道具のキレ味、素晴らしい。

[@UP-th2jk]

This is certainly a discipline worthy of my time! If I chose to master this wonderful skill, I will entrust it to my most patient grandchild. Thank you Dylan Iwakuni, and thank you Japan!

[@Texaca]

谢谢，这很有趣。-- by Google ✌🏼

[@jimh4375]

There are 11 reasons I don't do carpentry, 38 of them are in this video. (still amazing to watch)

[@pcvw500]

正に職人の技。パズルみたいな構造。ボンドや釘を使わずに繋げるの凄い。

[@erkanun]

"Kündekari" sanatına bak

[@greedyy6575]

I dont understand why is it become japanese joinery. It is Mortise and tenon joint structure from China.

[@mohamedkarrouk]

From the beginning, i said that impossible to get assembled, but after watching this video, yes, Great job, nice and clean 👌

[@dylaniwakuni]

Cheers! 😊🙌

[@typograf62]

I did not think it impossible. But the construction would have to be with a sliding movement that I simply could not imagine. I think I now know a little about how we might look to an insect or other small animal: Beyond their grasp. Impressive!

[@28naveenator27van]

The chisel cutting the wood has a relaxing crisp sound to it. wonderful craftsmanship.

[@spnky-jp]

継手の方法もさることながら、手入れの行き届いた道具、見ているだけで惚れ惚れします。

[@LiamDTurner]

MIND BLOWN!....Watched this with my morning coffee...when this piece got hammered together, my head tilted like a dog... Amazing

[@matthewschultz899]

Dylan, have you considered making samples for stress testing? It would be interesting in seeing how different designs stack up against modern construction.

[@Aquilasven]

One measure of durability of Japanese style carpentry is that there are buildings in Japan, made entirely with wood to wood joinery, that have been standing for over a thousand years. How many houses in a modern subdivision, built with modern materials like OSB, rigid foam, zip sheathing, screws, nails... will still be standing in 1,000 years? This particular joint may not be as strong as welded steel, but wood joinery is an incredibly durable way to build.

[@Don1atUTube]

Don't they have a lot of earthquakes in Japan. Perhaps these joints allow for movement. Just saying...

[@カオル-w4u]

今も昔も　日本人の技術力は世界一。正に芸術。表から見えない場所(屋根裏や縁の下などの柱は構造上重要だが表から見え無い場所)にも　こだわる緻密さは日本人気質を表している。

[@vincents3334]

I thought it was impossible. One thing for sure, I have to sharpen my chisels.

[@addywolf8559]

This is a really clever joint. If it's used on a vertical beam, the pressure from the roof keeps it in place. That's never going anywhere. Excellent craftsmanship, I hope to be as good with a saw as you are one day!

[@dylaniwakuni]

Cheers 😊🙌

[@thecuongphung8196]

Thank you for sharing! Can i ask you, how much time did you need to finish this work? And the dimension of the wooden

[@spig3547]

Most video show people doing work like this purely with hard wood, being able to do this type of work on softwood is absolutely a level above.

[@RYO-B4]

これで持ち家作ったら100年以上引き継げそう。 費用は考えない事とする。

[@nuruosan4398]

いくらかかるかなんて考えたらいけない。 きっと目ん玉飛び出る金額になって思わず声が出ちゃうよ。 ひよぉ～って (｀・ω・´)ｷﾘｯ

[@daizu2011]

現代技術も良いが、こういう職人の技を後世に伝えていくことも必要なのではないかと痛感。 手っ取り早く効率よくだけではなく、手間がかかっても今あるもので何とかしようとしてきた先人の知恵と工夫は今の時代だからこそ必要になるのではないでしょうか。

[@heetkazu1801]

のこぎりってこんなに綺麗に切れるのかとそこで既に感動してしまいましたｗ

[@jimbeam-ru1my]

the japanese have always been good carpenters. that's why I collect japanese guitars.

[@lyricospinto8940]

これはまだメカニズムの想像がつくほうで 不可能継手というものがあって それはいくら考えても構造がわからない

[@garthbarrett6067]

The genius of the original designer is mind=blowing.

[@mostlyinterested1016]

Now that's the difference between a carpenter and a craftsman. Wonderful concept and brilliant execution.

[@alfredoj1349]

the level of craftmanship that existed in the past is simply unmatched nowadays

[@みよし三吉]

日本人ですけど これは凄い技術ですね、本当に不思議なパズル。 この技が継承されるのは喜ばしい限りです。 世界中の至宝だと思います。🇯🇵🇯🇵🇯🇵 継手の組んで見えない部分に作者の名前が墨で書かれていたらいいのに。

[@愛ちゃん-z5m]

別に継承される技術ではないと思う 後世にどういう仕組みかわかるかい？ ぐらいの遊び心がなせる技です 強度的にもっと強い継手ありますよ

[@matschmoon]

My highest respect to the inventor and also to the craftsman for showing this ancient technique to us. Thx, mate!!

[@テルルレン]

まさに匠の技、職人技 400年以上前にこんな技術があったとは、驚きです。 しかも、誤差ゼロ ！！

[@tung4449]

因為日本人是中國人的好學生。

[@糞偶愚瑠]

大正時代に補修した時の大工さんが組んだらしいですが。

[@愛ちゃん-z5m]

@@糞偶愚瑠 昔はこういう遊び心が あったんだよね 職人さんの手間も良かったし 俺も色々遊ばせてもらいました 大手から坪いくらで請負ってたら 手間にならないですから

[@三毛にゃんジェロ]

なるほど、滑らせながら組み上げるのか。🙀 先人の知恵と工夫には只々感服。👍👏 仕組みがわかっているとは言え、簡単そうに組み上げて見せる腕前も凄い。

[@edgarkalwait446]

Seeing joinery like this always makes me wonder, how on earth the first craftsman did come up with it - like with no CAD and possibly not even real pen and paper 🤷‍♂. This is the true mystery!

[@deldridg]

Therein probably lies your answer. I often wonder similarly about Mozart, Bach et al. No MIDI, no multi-channel recorders, no keyboard synths etc. The wiring of the problem solving and innovative minds that came up with such wonderful mysteries perhaps couldn't exist in these modern times. Hopefully not the case but... Cheers - Dave

[@neuvocastezero1838]

This type of joint probably evolved from the combination of a couple of other joints. Still beautiful and impressive though.

[@jsullivan2112]

Genius.

[@nemopoint1254]

こういう巧妙な継手は木工が盛ん＋地震( 緩むと倒れやすい )が多い地域では必須の技術として発達するんだろうね。 一般の大工徒弟制度では普及しにくい宮大工系の奥義なんだろうな。軸方向に対して真横や斜め横から継手で組む方法は一般に普及してたろうからそれの３Ｄ版なんだろうが、コロンブスの卵みたいな柔軟な発想のできる宮大工さんだったろう。 工学的に分析してみても斜めの角度とかその幅とかが接合強度最大値になる比率とかかもしれない。 で、こういうのの石版が遺跡の巨石文明と思われる( 隙間なしの石組み )。

[@kdawg3484]

Stunning. The joint and the video. Let me explain. :D From the outside I think the joint looks cleaner and even more mysterious than the Shihou Kama Tsugi. The asymmetric design of this one is more baffling. The actual crafting of the two halves and the finished product before sliding together really shocked me, though. I knew it would be angular and complicated, but I wasn't expecting it be THAT angular and complicated. And beautiful.As for the video, the shots at night are just something else entirely. There is a peacefulness and focus and strange comfort watching woodworking in the dark with just enough light to do the job. I don't know if this was intentional or you were just taking advantage of a chance to work without so many people around, but I think you've found something I really am struggling to put into words.Another great job as always, Dylan.

[@dylaniwakuni]

Thank you for your kind comment! 😊 I’m happy to hear you enjoyed the video. Shooting in the dark wasn’t intentional but I’m happy you enjoyed the shots. Cheers!

[@TheDamonRa]

The background noise of someone else workin on another project is distracting, making it difficult to concentrate on watching you work. Other than that, your work is amazing and beautiful. That, and learning how to make different joints is why I subscribed.

[@doomakarn]

What kind of genius figured this out?

[@pauloakes6952]

The Japanese kind.

[@Iowa599]

A bored monk.

[@derrickstorm6976]

People with good education And probably with different iterations of the joinery

[@EinfachFredhaftGaming]

People woth no social media or television serving as a constant distraction 😄 Try sitting at home and only looking at a spot at the wall for an hour without a tv or music playing and your mind starts to do crazy things. Basically a form of meditation

[@coreygardner1371]

Oh come on. What's with these replies. [Smartass mode activate] A carpenter? 😁

[@lsanderson40]

Thank you for sharing. I love the craftsmanship of these joints and woodworkers.

[@lachezarobretenov708]

ewen when the pieces were ready i still didnt know haw to do before the end of the video ...awesome

[@collinmc90]

Fascinating, simple yet complex.

[@ぬあああぁぁぁぁ]

すげぇ… 何を食ったら｢スライドでピッタリはめる｣なんて発想に至るんだ…

[@davidm1149]

Thank you so much for posting this. I've always wanted to learn how to do joinery and woodwork. You make it look simple and easy. Very Good!!

[@ctakitimu]

Watching this gives me a better understanding of the pyramid builders in a way, with their precise cuts on massive stone blocks. Like this join, we all think it can't work. Until we realize, they were just much much better at their craft than we are today at the same craft. We've lost a lot of the skill the old world had. Sure we're discovered other things, but just imagine all that has been lost over the centuries

[@markbtw7987]

A lot of people think about people in the deep future being much smarter than we are too. May be the case with all of the technology. But also very possible they'll only be as smart and crafty as we are, if that.

[@oggyoggy1299]

Huh? This is being done today. What craft was done better than it is now?

[@bg357wg]

@@markbtw7987 with things being a lot easier, I’m sure we stand to lose a bunch more skills…I’m sure certain things still considered basic survival skills today will be lost

[@benbaselet2026]

Name a single skill from the old world that has been lost. Pyramids are just made by stacking rock, we could easily do it today.

[@markbtw7987]

@@benbaselet2026 Well, there is the joinery from the video above lol.. That's one. They had to use x-rays to figure out how to do it, which is kind of cheating. The pyramids were a magnificent feat and there's little chance that modern humans would be able to craft such a monolith with the tools they had available then.

[@wutzefung]

大開眼界，非常之好嘅工藝，簡直係藝術品！👍🏻👏🏻🙏🏻

[@rwcowell]

This just goes to show what the human mind is capable of creating. The first time I saw the joint I was intrigued how it came together. Thank you for demonstrating the steps required into making this joint.

[@Zave85]

the sound made by the tools on the wood is a good part of the experience for me and having someone else working in background making loud saw noises completely ruined it for me :(

[@masmainster]

Thanks for showing that, that is one beautiful joint, and expertly made. I take my hat off to you.

[@XD_PD]

Thats a part of miracle.. so beautiful, and so precise❤ not a woodworking, but art..

[@TigerCarpenter]

thank you so much for sharing this secret with the world. we appreciate it so much. many masters take their secrets to the grave and then it is very hard to reinvent something. I am going to make one too, just to practice and to try it out. I noticed the Osaka post has additional wedge square hole. is the wedge necessary to keep the post tight? or will it last for a long time even without the wedge?

[@dylaniwakuni]

Happy to hear you enjoyed the video. I don’t think a wedge is necessary if it’s properly made. Also, great to hear you’ll be giving it a go. Good luck and have fun!

[@davidhayes4814]

…… where the join is exquisite and more stunning than the original. Some high-end repairs to beautiful 17th and early 18th century furniture were likewise so special that they enhanced the original item ..,… the antithesis of a bodge. Magic.

[@sergedezaphix3130]

Bravo magnifique travail ! la précision, et la dextérité du geste .

[@nickhale2900]

What a complex appearance that joint had and yet it was simply slid together, genius. Love the satisfying sound of the sharp chisels shaving the timber.

[@robbydaniels1776]

Definitely makes alot more sense now that i saw how its angled and driven together. 👍

[@jimwinchester339]

I have a new additional respect for the people of Japan. Damn, they are clever!

[@a-ms9760]

This is the most controlled, quietly-made joint i've ever seen. And hot dang those chisels are beautifully sharpened.

[@dylaniwakuni]

😊🙌