Japan’s 400 Kilometre Tsunami Shield

[@waedidmyhandlechange]

Can't believe that it's been 10 years since the tsunami. It feels like those 10 years just flew by.

[@danielwhyatt3278]

I’m with you there. It feels like a while ago but not THAT LONG😱😟. To think it actually happened in the same year as the royal wedding between Prince William and Kate. That feels like a pretty good indicator. So much has happened in the past 10 years that feel like they’ve gone by in a flash, and yet at the same time hardly anything has changed at all.

[@crankysconga]

i know we're almost at PS6

[@karl810]

@@danielwhyatt3278 really? they're on their 3rd child i thought it was much longer ago going by that, though I've gone from my 20s to my 30s so I guess that makes it feel longer 😅

[@emilholmsten8600]

The ocean is surley dying 💚

[@danielduncan6806]

That is how it goes for us humans. We have incredibly short lives.

[@hhydar883]

I actually like the idea of building forest walls along the coastline. One force of nature can be efficiently tackled with another form of nature. Even mangroves are a brilliant solution but i dnt knw if they are fit for Japan's climate.

[@joymajumdar8019]

Yes and trees are intelligent they deep root themselves accordingly they will definitely slow the pace of tsunami. And well next generation alarm warning system should be installed. Evacuation to be carried out swiftly.

[@fplprefect5176]

What about building huge/wide trenches along the coast, maybe a few miles deep. Wouldn’t that reduce the energy of the tsunami?

[@MrFlatage]

@@fplprefect5176 Nope.

[@hhydar883]

@@fplprefect5176 Trenches can help in case of hurricanes, typhoons but not in terms of tsunami due to the amount of water and force it brings. Systems like underground storage spaces in Tokyo are already in place to tackle floods and events of massive rainfall.

[@Supirbemo]

Its tsunami we talking here not just some hurricane or typhoon

[@AbroadinJapan]

This was a very well researched video! As someone lucky to live on Japan's east coast, I've traversed almost the entire length of the tsunami shield over the years. The locals seem to have mixed feelings on them, many sacrificing sea views for safety. The government didn't give many towns and villages much choice in the mater unfortunately and in my view, they've gone too far and built too many. Just last week I drove passed a beautiful beach that had no houses or villagers nearby, but the entire area has been smothered in concrete. Still, for the most part the reconstruction in Fukushima, Miyagi and Iwate has been impressive and many locals are optimistic for the future, despite the nightmare they endured.

[@miroslavmilan]

Just a silly idea - they could have built them a few hundred meters inland. That way people would have a choice. Those who prefer the unobstructed sea view but don’t mind getting their property destroyed and rebuilt could continue living on a natural coastline while the others who prefer safety over views would live behind the wall. With some quick escape routes through/over the wall in case of emergency, which would also serve as a way for people to get to the beach without walking/driving long miles around the wall.

[@zainmudassir2964]

Hi

[@Morbisus]

Oh hi Chris.

[@waedidmyhandlechange]

@@miroslavmilan That's an excellent compromise! I'd imagine the intention was to protect as much property as possible as well, so the wall was showed right up to the coast. On the other hand, it's really an eyesore for a community whose livelihood largely relies on the sea.

[@vcalblas]

@Abroad in Japan, I love your videos in which you interview people who were affected by the tsunami and how they picked up their lives after. I have recommended to dozens of friends, who all liked it just as much as I did.

[@lucianolizana446]

In Chile, after the 2010 earthquake and tsunami, the aproach in the city of Constitución was to build large forest areas in the coasts to laminate the water (and also create new green areas)

[@marcorodrigues8303]

VIU COMO EU AJO EM SISTEMA CONTRA ESTE CRAZYS E A SIM E SEMPRE SERÁ A SIM . ENTERRAR ELES DE VEZ .

[@-SP.]

@World2021Order Tokyo isn't the richest city on Earth you goof. New York has more billionaires than all of Japan combined. Tokyo isn't even the richest city in Asia

[@kf510]

@World2021Order it's 2022 now, you're passé already

[@kf510]

@World2021Order by GDP? lol sure if you think it is an accurate measure of wealth. it is only number 1 because of its population size which is a part of the GDP equation. With its population aging fast, not much time left to gloat before its GDP slips lol Just facts boomer

[@juicyfruit4378]

@World2021Order uh no - NYC and London are the two most expensive cities in the World

[@Tomoyuki473]

I live in Japan and was driving along the Sanriku coast last week. It really is remarkable how far Japan has come in 10 years.

[@TheGundameister]

Trump: I’m going to build a wall Japan: hold my sushi.

[@FreedomIII]

And you can't walk through this one XD

[@whathell6t]

@@FreedomIII And it's cheaper since Japanese have the Martian Pandorian Box to quickly build the wall. That interdimensional machine can prop it up in 10 seconds, assuming no one get caught in it and be catapulted to outer space.

[@marcorodrigues8303]

ESTE AI TA CADA VEZ SE EMBARAÇANDO . EM SISTEMA DE REDE CLONADA .

[@B-A-L]

Japan rebuilt a 6 mile stretch of road after the tsunami a day later and yet there are areas of New Orleans that still haven't been rebuilt after Hurricane Katrina in 2007.

[@lol369]

Hold my sake

[@TheBritalianJob]

I wonder if they could make a feature out of the walls - creating a raised embankment on the land side so that the view can be enjoyed again, mainly as public parkland or as private enterprise leisure districts. I’d imagine that amount of earth against the walls would also help reinforce them

[@precursors]

The amount of earth to raise the land to wall level would be unimaginable

[@TheBritalianJob]

@@alexroge6495 for sure. maybe that commercial element of leisure districts could offset the expense, at least in populated areas

[@danielwhyatt3278]

@@alexroge6495 Could still be a very good idea.

[@bliblablubdiedadup742]

@@TheBritalianJob No way you get that much dirt, walls would be 3 times thicker because of the editional weight and the walls are close to homes - which means these would be demolished to rebuild them in a heavely indebted japan?

[@TheBritalianJob]

@@bliblablubdiedadup742 yeah it only makes sense in populated areas where the locals feel “imprisoned” by the wall. And the causeway would only need to be wide enough for a pedestrian path and some leisure facilities to take advantage of the new view - the commercial element of which would pay off the public works

[@garrettk7166]

The 2011 Tsunami hits me hard, emotionally, every time I hear about it. I was on Maui during that, and we were terrified that we'd get hit by the tsunami. Thankfully we didn't. My heart goes out to Japan.

[@marcorodrigues8303]

TEM UM FATOR LA EM 2017 POR AI EU FALEI BEM O QUE VEM CAUSANDO ESTE DISTURBIOS NA NATUREZA AI . SOBRE RASTROS QUIMICOS E GÁS CARBONO . QUE ELES DO MAL ANDA ESPALHANDO NA ATEMOSFERA . CAUSANDO CHUVAS E TEMPORAIS FOR DA ESTAÇÃO PROPIA . COMO MANDA HA NATUREZA CAUSANDO UM DESENQUILIBRIO TOTAL

[@marcorodrigues8303]

☁🛩☁🌩⛈🌨🌪

[@marcorodrigues8303]

🏭🌁🗻🏔POLUIÇÃO E O DERRETIMENTO DAS GELEIRAS SIM ELEVANDO O NIVEL DO MAR . QUE ELEVA AS ONDAS GRANDES TISUNAMI SO EXISTE PORQUE ENCONTRA O NIVEL DE VOLUMES ALTERADO DE AGUAS NO OCEANO SE ELAS ALMENTA O ELEVADO TISUNAME TBM E GRANDE EM ALTURA SUAS ONDAS .

[@willcragg]

I just finished watching the video about the wooden skyscrapers. I just love the B1M, they always have great video

[@lk5k8]

Thank you

[@SimplyCivil]

I really enjoyed reading through the innovative and creative solutions mooted in the comments. It's great to see such discussion stimulated on big engineering projects. A couple of broad themes I noticed we're 1) build a concave/wave return wall and 2) the issue of sea level rise. 3) the use of trees etc. With 1), concave walls with wave return crowns and similar are designed to reflect wind wave energy back seaward. The reason this wouldn't work in a tsunami is that a tsunami is a very very long wave (km in length) in comparison to a wind wave (10s of metres in length). Thus the wave energy is spread out over a huge length. This is why the wave takes 10/20 minutes to inundate before the water begins to recede. It is analogous to a open channel flow like a river in a continuously rising flood condition. So wave energy reflection, which can also rely on the wave breaking to some extent, is not applicable here. 2) sea level rise. The point is that the current infrastructure is built on a known mean sea level. Once we start getting the SLR effects then such infrastructure might not be able to perform its function as well. Here, a 15 m tsunami wall may then be only 14.5 or 14 m in the future. This strikes at the core of the debate: do we build hard sea defences in a 'hold the line' approach or do we retreat from the shore line completely, or do we use natural defences or a combination thereof. 3)On mangroves and forests. It's proven for hurricanes/typhoons and storm surges that these can help a lot. But it's less clear on tsunami. Again because of its open channel flow like behaviour. The tohoku tsunami of 2011 resulted in a lot of said trees becoming floating missiles. Some of our experiments also showed that the flow constriction effect (reducing the flow area by adding obstacles) can result in higher flow velocities through the remainder of the area. There's much work to be done in this area still.

[@purplecow_1]

Whoa, you were in the video. Hello sir, thanks for the work you and your team do!

[@moee222]

Your in the video right

[@moee222]

Very wise man

[@daviddleon9127]

Hello.. 👋🙂 🇬🇹

[@thomasr1051]

Damn fascinating stuff. Yeah I think planting trees is a catch-all for a Bunch of good intent. We see them as inherently stable yet flexible. But some of these forces are not the same. Like you said the reason mangroves help diffuse hurricanes doesn't make them effective for tsunamis

[@economicsinaction]

Just get 🇳🇱 Dutch and 🇯🇵Japanese engineers around a table and sea flooding problems are no more!

[@unvergebeneid]

Did you watch the video? There are no easy solutions.

[@EBLego]

@@unvergebeneid yes there are

[@CrasusC]

Somehow I find this comment quite arrogant, humans can harness the forces of nature, but we can never assume that we can defeat the nature's fury! With a name such as Economics in Action, I'd thought you would know that there is not enough money in the world to defend against sea flooding for all coastal population centres at risk.

[@PROVOCATEURSK]

@@CrasusC You can force people out of there, solutions are easy but the governments are weak nowadays.

[@CrasusC]

@@PROVOCATEURSK Do you know that 40% of world's population lives on the coast? Majority of their livelihoods depend on where they live? And many of them will starve if you force them away from the coast? Not to mention that the world's economy will definitely collapse, resulting in famine and hyperinflation if what you are proposing is put into practise? The damages done will be far greater than the Tsunami's when they occur. What you were proposing is a "throw the baby out with the bathwater" type of solution, which would be far worse the the problem.

[@djp1234]

I still can't believe they put the Fukushima emergency generators on the ground floor and not on the roof. How did they not see this coming?

[@timberwolfe1645]

On the roof makes no sense! Imagine going to work and going on the roof. No way anyone puts stuff at the top

[@djp1234]

@@timberwolfe1645 it’s the 21st century. We have elevators. We have the technology.

[@yashrajsomvanshi128]

Japan is just one incredible country!🤩

[@ticksunbs4944]

While China isnt one

[@DacLMK]

@@ticksunbs4944 What do you mean?

[@Michael-yz4mc]

Are you sure?

[@theemightymuffin]

Japan's number one problem is meth

[@donbrashsux]

@@theemightymuffin what ?

[@thuydao8945]

Regardless of what they did in the past. Modern Japan is a great aspiration for the world to look up to.

[@user-qv6ud2hx6f]

They need to apologise for what they did; like Germans.

[@kumoj]

@@user-qv6ud2hx6f why would the people who have never done anything wrong in their lives apologize? you want them to revive the ones who actually did it?

[@user-qv6ud2hx6f]

@@kumoj It is called historical responsibility. Why white people in US have to acknowledge wrong doings of previous generations versus black ? Anyway - ask Asian people if they (and not me) want Japanese to apologise. This generation benefited from their parents' evil.

[@thekraken1173]

@@user-qv6ud2hx6f No they don’t.

[@TinaMcCall.]

"Be like water" is a martial arts tenet for good reason. No matter its state, it will find a way to create and destroy.

[@joelpichette]

and don't forget that one "the water flow"

[@anturanggatantra2137]

Don't forget, water also vaporize. So if one day you find yourself in a tight spot, just vaporize yourself.....

[@goodhuman5036]

Respect ✊Japan 🇯🇵

[@ALTALE717]

ありがとう🥰♥️ この動画は学びがある。👍

[@RussellChapman99]

Fukushima almost failed safe. But for the location of the back-up generators and heat-exchangers, there would not have been a meltdown. The plant survived the M9 earthquake, but it was the size of the tsunami, (nobody imagined it could be that big), which overcame the back-up systems. Nuclear power is pretty safe, built on modern systems, away from seismic areas, it is highly unlikely a Fukushima MK2 would happen again. The tsunami killed way more people, over 20000, than the meltdown, less than 600.

[@rriedel2671]

Immediate deaths you mean, right!? The Fukushima meltdown caused a problem way more serious than the tsunami, the land that is. Like in Chernobyl, a huge plot of land is now abandoned, and it will be for at least 100+ years. So no, nuclear power is not safe, it can acctually be considered the least safe way of getting eletric power, if you consider the risk of a meltdown, even more if the plant is next to a huge population area, like Fukushima is.

[@iain3713]

@@rriedel2671 Fukushima killed 1 person from radiation, there were more deaths due to the panic of an evacuation

[@Joseph-xj4ex]

@@rriedel2671 Chernobyl isn't completely abandoned, lol.

[@randellgribben9772]

@@rriedel2671 having a home near a coal debris mound.( after they have burned the coal )not to mention, all the toxic heavy metals.. coal kills more people than atomic power. it is far more radioactive than living next to a well taken care of nuclear plant..

[@joelpichette]

The next nuclear plant incidents will probably happen in the united states and be due to a lack of maintenance and supervision, lack of investment and care. Why do I feel it will happen there? Wikipedia source: [Nuclear power in the United States] As of October 2014, the NRC has granted license renewals providing a 20-year extension to a total of 74 reactors. In early 2014, the NRC prepared to receive the first applications of license renewal beyond 60 years of reactor life, as early as 2017, a process which by law requires public involvement.[10] Licenses for 22 reactors are due to expire before the end of the next decade if no renewals are granted.[11]

[@adarshpandey8023]

Japan always has something incredible. The more I see, more I learn.

[@Sheppo42]

In his Hardcore History podcast series on Japanese culture and it's impact on the 20th Century (Supernova in the East) Dan Carlin says "The Japanese are just like everyone, only moreso" and it really is spot on. Check it out if your interested

[@keith5790]

a lot of ppl here in Japan say it's better to just live somewhere else rather than building a wall that blocks the beautiful ocean view

[@unvergebeneid]

Yeah I mean, what's even the point of living by the sea if all it gives you is a massive grey wall? Might as well live somewhere that also doesn't have an ocean view but doesn't have a concrete wall view either.

[@bih1773]

I've read that some people are against them because they give a false sensation of security. Some people died in 2011 because they trusted in the former walls. The new ones could increase that feeling of safeness

[@bih1773]

*false safeness

[@keith5790]

@@bih1773 yeah that's very true, and with this wall we can't even see how big the tsunami is it was just a waste of money

[@Lildizzle420]

why didn't they make the inside of the wall a ramp like they do in denmark so it looks more like a hill from the inside. it would still block the view of the ocean but from the village it would look like any mountain side village surrounded by hills and forest.

[@Saltytide2424]

Fantastically made video.

[@TheB1M]

Thanks! 🙌

[@gregparrott]

One item not mentioned here is that not only was the tsunami taller than the wall, but that the subduction caused by the fault's slippage LOWERED THE WALL ITSELF by about 2 feet.

[@asdsdjfasdjxajiosdqw8791]

It might be a different scale to the construction this channel normally features, but could you do a video on bicycle highways in Europe? Or just cycling infra in general?

[@patriciaramsaroop5108]

“Not just bikes” is a really nice channel that has many informative videos on the cycling infrastructure.

[@asdsdjfasdjxajiosdqw8791]

@@patriciaramsaroop5108 I know, it's great.

[@Xpert56]

@@asdsdjfasdjxajiosdqw8791 or city beautiful

[@kimkim-mh7bv]

If it happen in usa. People ready die without wall lol. Waste of time and money to build wall. It should let sea water go in and out instead. It is racist to against water lol ;D

[@MrFlatage]

@@asdsdjfasdjxajiosdqw8791 wtf? bicycle highways? How fast can you cycle again?

[@door-to-doorhentaisalesman2978]

They should make three 50 meter tall walls and call it: Wall Maria, Wall Rose and Wall Sina.

[@mclovin6537]

I was there in 2011. That was nuts. I mean I was closer to the west coast than the east but I felt that earthquake and I was there during that radioactive crises. 😵‍💫

[@Carfeu]

Waves: 15 meters Wall: 14.7 meters

[@MT-zs1rd]

Hey the channel reached 2 million subs, let's go!

[@dnlgrmn7169]

The subscribers need to start watching the videos, then each video would have at least 2million views…….

[@geoffreythorberg2580]

A few things... When building sea walls, instead of just tall thin wall - infill the land behind. This would raise the ground level and enable people to still see the sea. There could be a 500m wide park along the top of the infill behind the wall. Another consideration would be to build a break water wall ~1 to 2+km away from the coast. It would prevent, slow, delay, the oncoming wave from pulling back the coastal water that the wave uses to increase height. When the tube and sewer system was build along the Thames, the wall was build, the sewer, underground trains tunnels, and services etc. It moved the side of Thames. This has been done before so can be adjusted to suit the topography. Additionally, there are no outlet doors on the sea walls. So any water that does go over the top or around the wall, can pass back out to sea without puddling, pooling on the land side of the wall. Similar to the Old over flow doors on the London Sewer System that dump raw sewerage into the Thames when it is too full (rain etc). No sea water in but over flowed water can exist. The nuclear plant would not have exploded IF power had continued to run the pumps. The US Navy had a ship running the pumps. It was removed because it was being contaminated with radiation. The ship could have remained and when a ready steady stable power supply was connected - then move the ship and decommission it. The US Govt put the value of a ship above the need for power for the safety of the facility!

[@marcorodrigues8303]

ENTÃO POVO E SO ENTRAR COM O CRAK A PEDRINHA O PÓ EU ENTRO DE MARIA ENJUADA QUE NOS ACABAREMOS COM A FESTA DELES

[@kingminecrafterchris-KMC]

I love this video B1M, I visited Japan and the Fukushima area, as well as had a private tour because I studied it and was fascinated, the most incredible thing was seeing the power the tsunami had, I stood ontop of a seawall and saw it had still damaged the first 2 stories of the building behind me, I saw concrete cut by the power it was incredible and fascinating!

[@danielwhyatt3278]

That must’ve been quite an experience to see it afterwards. When did you visit? I really want to go along to the Fukushima area someday. Not just to see the damage but how the area is truly recovering with my own eyes.

[@raleindecker]

Hasn’t been a 9.0 or higher Earthquake since 2011. A monster in the making, only time.

[@krrangarajan5391]

Netherlands:Take Notes,Take Notes

[@krrangarajan5391]

@ᴛᴀᴘ ᴍᴇ ᴀɴᴅ sᴇᴇ Emily I don't know who u are lol ,I guess a group of u commentary are trying to trace my comments for some reason lol ,Or maybe youtube is just messed up lpl

[@sastrysarikela2457]

Wow wonderful subject. Nice presentation. Sir.

[@LegitimateEU]

Dr. David McGovern has a super cool vibe :) He looks and sounds like he would be super fun to talk to over a cup of coffee. Nice video.

[@baghyamendis2779]

Japan need the "Founding Titan"

[@gerg325]

The problem is that most of these calamities evolve over time. I love the artificial cliff suggestion but I want to imagine how much earth Japan can fill to spread across 400 km of shoreline.. Well researched video as always.

[@juanbaker8717]

Lucky for Japan much of the east coast is protected by mountains high enough to break the impact of the wave. So the only problem for them are the flat pnaes that are exposed to the sea

[@maiyenish8552]

It needs to be longer! Around Nagoya and Wakayama and Kochi

[@petershaw1984]

Been a long time watcher but subscribed recently and im addicted lol.

[@raedwulf61]

I am sure they didn't name the effort "Project Canute" because, well, you know....

[@MGZetta]

It's always weird when people get smart and start talking about the "cost" of a literal life-saving structure. Tell me how much a human life cost if you wanna talk about disaster defense.

[@Noubers]

It's always weird when people comment on a video without having watched it. If you had watched beyond the first 15 seconds you'd realize the cost they are talking about is the cost to the human habitat and the relationship that these walls have on the towns they surround, not the number of yen.

[@MGZetta]

@@Noubers Imagine talking about human habitat when it's about human life. Lmao. Pretty sure those barely swept away wished the wall was an inch taller. But I don't expect something smart from a person who thinks "cost" means only money. Then fast to come to a conclusion while lacking some brain cells.

[@MGZetta]

@@Noubers They literally complaining about declining fucking 'tourist attractions' and 'sea sights'. Pls, write that shit on those tomb stones whose died to the disaster.

[@pjesf]

This channel is marvelous

[@yden3631]

in some regions near by sea In sendai city, people must not build homes. the areas are flat and if tsunami comes, inhabitants cannot escape...

[@bih1773]

In those sites they tend yo built tsunami evacuation buildings which must be 2 stories or higher than the expected inundations dephts

[@emaar_post]

5:50 Very important information and good idea

[@SuperCrazyEstonian]

Deep rooted trees do a wonderful job on mitigating a tsunamis effects. It´s a great idea.

[@msd4757]

mangrove trees will play a good role in cutting the force of waves. It might be a good idea to plant trees along coast

[@wcsah]

I’m loving that you’re getting more primary source interviews in your videos. The quality is top notch!

[@PLAYAWORLDRecords]

kzbin.info/www/bejne/hqXdZounf5WtaLs

[@paulburman9972]

Thanks for this, great video as always😀😃

[@samjo435]

I have no doubt JAPAN is the gem of technology and modern construction.... A country running ahead of time... Great Country.....

[@EBLego]

You might say "the Great Wall of Japan"

[@alia2019]

this is the ONLY time one should say: "build that wall"

[@bloomeiblopa3446]

your home does not have walls?

[@ZZMJo]

@@bloomeiblopa3446 They have been already built? Or shall they been destroyed and built once again. I doubt it.

[@oliverbanes5121]

Honestly when is B1M going to do a video about the work I have done in my bathroom??

[@TheB1M]

When it's late and over budget. That always makes for the best stories.

[@jerfareza]

The moment when your city show up in B1M video, albeit only for a few seconds.. 😁

[@FurnitureFan]

Right. I'm still wondering why he added a picture of Irish west coastal cliffs.

[@jaybomb8371]

Your videos always get a thumbs up at the start because i know whatever is coming, it will be excellent!!! Cheers Ausgranny 🇦🇺🇦🇺👍👍👍👍👍

[@ghostrighter6530]

kzbin.info/www/bejne/bqHEiWaPlpxsn7M It is Johnny X the Japanese rap artist who is really good

[@marcorodrigues8303]

@@ghostrighter6530 SE EU NÃO FOSSE REAL PORQUE EU ESTARIA PERDENDO TEMPO EM VOS COMUNICAR. E VOCÊS QUE TEM QUE CAIR NA REAL DESTA TURBULENCIA EM QUANTO E TEMPO .

[@ghostrighter6530]

@@marcorodrigues8303 kzbin.info/www/bejne/mpimYoehnpKJpK8

[@user-tn8er2km1q]

Thank you for the video and the research!

[@tapansharma4484]

Love your work... Keep making such interesting videos 💥

[@nopers2223322]

Thanks for making a video about important buildings not just Arab vanity projects

[@6yjjk]

1:49 That pictogram needs to run the other way. Took me several seconds even to see the arrow.

[@anthonygaiman4815]

I was always told that a pictograph was a image that represented a number of like objects

[@pikachuhatyu]

I appreciate the fact that I have the same rice cooker as Dr. David McGovern 2:30

[@simonyapp]

These walls are such a eye-saw! Why didn’t they used the 12 billion to relocated lower valley based towns up to higher ground and use the valleys for farming, sport facilities and non home or office use. I feel for the communities that now can’t look out to sea anymore.

[@air7tv]

Some towns did that, I've visited the area recently and seen documentaries on it. One town used a giant converor belt system and moved an entire mountain down the valley and raised the town up over 10m before rebuilding houses started

[@NeustriaN]

Everything is money. Even if they build a new home on a hill, they still need the same walls to protect the land and assets of the valley, which is their foundation of life. Have you ever wondered what happens to fields soaked in seawater, oil and rubble? It was also feared that depopulation would progress because it would take time and budget to build a hill that requires the consent of the majority of residents. Finally, many towns in the Tohoku region, with the exception of big cities like Sendai, are rooted in the ria coast like the fjords. A vast setback like a dirt hill behind a wall is not possible.

[@arifandi1861]

They are not money machine

[@liveletlive3348]

_What Tsunami we are taking about came in 2011_ _It feels like just yesterday_ *Time flies*

[@JamesWhite-yj7sd]

i don't thing it will stop a ship being driven by a tsunami there go's the wall

[@user-xz4oc6mr6i]

In my opinion they rather should build some protection system on water that stops or weakens the tsunami long before it hits the landscape.

[@rafaelbaldini1818]

Impossible since tsunami waves approach the coast at 800km per hour, and they come in several waves, with an absolute force

[@cachecow]

A total eyesore. You'd think someone would do something esthetically pleasing, especially in Japan

[@vomm]

That's the real protection of these walls, that people feel like they're in a prison and move away.

[@sriram_raghavan]

Japan is my favourite country. Very hard working gentle people.

[@OrdinaryApprentice99]

What a beautiful video this was. It reminded me on my own experiences with the ocean and how I nearly fell to its tricks and power. Yet I still find it fascinating how Japan went to it head first to atleast have a defense because it could happen any day again. I was always thinking : „why don’t they just build huge walls to protect themselves from these tsunamis because the world knows for damn sure Japan will probably go down from natural catastrophies such as Typhoons, seasons with huge amounts of rainfall, Tsunamis, earthquakes and so on.“ (Sadly half of it happens yearly to them) This video gave me the clear answer I wasn’t thinking about. In a Country where citizens work their asses off to survive and get food on the table for their families loose one more important thing they’re attached to… the sea, the ocean. The view and smell, the cold breeze on a warm sunny day straight from the ocean. Everything combined gives us a sign of peace in our hearts, which gets completely stolen from big walls. So what are we going to do? Plant forests over forests? Build larger wall systems ? Escape and flee from the shore lines? In my opinion there’s only one thing you can do against nature : Work with nature. Walls are straight answers against it while planting trees and creating big green parks would only help against said catastrophies and for the people living there mentally. Fear of death always scares us and drifts us apart from the ocean. I, myself was caught in such huge waves once and drifted, nearly forced away by pure pressure and waves. How did I manage to get back and survive? I had no power, my legs stopped moving. All I had was a ball that I tried to get back before it gets lost to the waves pushing it back. I pushed my chin over the ball knowing it couldn’t sink and would always push itself upwards and I slowly paddled with one arm while I tried to keep my head on the ball with my other arm. After 5 to 10 minutes everyone realized I was in danger and immediately swam to me and helped me to get back to safety. Later on a very smart guy told me I was around 500 meters out (which I can kind of agree on because when I started to swim back everyone suddenly looked like little ants far away running around on the sand) Am I scared of the ocean now? Hell no. I even got more interested into diving. I started to respect the ocean and it‘s power, and now I know how I can survive from it. That’s how Japan is doing it right now. They failed, put themselves back up, respecting it even more than before and trying to find ways to never let it happen again. I hope they find a good natural way so everyone is happy and is able to feel safe again. Amen.

[@kgcotton326]

I am Japanese. Most of the countries are no longer restricting food imports due to the Fukushima nuclear accident. Recently, the United States lifted its restrictions. 🤝🤟

[@PanzerDave]

Yet another great video, although there was one important item that wasn't mentioned. It wasn't just the height of the tsunami that caused issues. The land subsided quite a bit from the earthquake while at the same time the sea bed rose. Land subsidence in some areas was 2 to 3 feet (.6 to 1 meters) while the seabed rose almost 10 feet (3 meters) in some areas. Interestingly, some areas of Honshu have recovered the lost height. This subsidence and sea bed rise affected the tsunami protection and in a few areas allowed the protection to be over topped.

[@sedicibrah2025]

Glad we had the expert on tsunamis and fluid mechanics come in

[@sierranexi]

As devastating as the tsunami was, walls dividing towns sounds like a recipe for its own set of cultural disasters.

[@daos3300]

the walls aren't dividing towns, they're dividing communities from the sea.

[@dzaki8331]

1:20 "World Leader Of Coastal Engineering" Netherlands : ***BRUH***

[@LeechyKun]

Residential Owners: I don't like the wall, it blocks the ocean view and I feel like I am in prison *Tsunami comes* Residential Owners: Thank god those walls were there.

[@7ajhubbell]

Thank you for sharing this.

[@cappyjones]

Your content is amazing. You deserve every bit of success you have achieved!

[@kashettyavp]

Wow, it's look magnificent 👀. Love from Hyderabad, India 🇮🇳.

[@kraftmayo]

I recommend your channel to everyone I meet ❤

[@nagendramishra8947]

They should design those wall with bit of curvature So that it can use flow of water against the water 🤷

[@jif.6821]

The efficiency of the Japanese never fails to amaze me, and I'm half Japanese born there. Too create this much steel reinforced concrete walls in such a relatively short time is mind-boggling.

[@loopbloke]

Mangrove forest is found to be the most effective barrier against Tsunami so far.

[@Victor_Gvne]

7:05 CMA-CGM building in Marseille, France. I really like it

[@cannonshooter732]

One of the other issues not frequently highlighted with the 2011 quake was that parts of Honshu slid eastwards and subsided (lowering the original height of some coastal seawalls). I believe the city of Ishinomaki saw some of the greatest land subsidence where some residential areas remained flooded even at low tide post-2011. Another thing one of the researchers (the one with the glasses who often times is interviewed in documentatires and Japanese broadcasts) at Tohoku Univ found was a previously unknown phenomenon which made the tsunami height greater than expected (something to do with a bubble of water that was caused by the quake which the tsunami itself ended up on top of). Basically, you can only mitigate against nature to a certain extent.

[@kailengray2822]

but it's sad that the wall blocked 400km of views to the sea to some extend

[@mrb5394]

They need to put live video on the other side of the concrete. So people know what’s happening on the other side in case of am emergency.

[@oetaurqo1133]

this concrete prison border looks horrible and it's not even guaranteed that it will protect people from the next tsunami... I hope they will bring The Morino Project to life in the near future.

[@user-er8tr9kt8l]

They could at least build the upper half or so out of glas ... if its really just the hydrostatic pressure like this guy said then it should work.

[@mayureshgawade3842]

Congratulations for Completing 2 Million subscribers..Many more to come

[@Natasha-tu5qs]

Just an FYI, tsunamis have nothing to do with climate change. Yes storms might occur more frequently, especially in the tropics, but tsunamis are caused by earthquakes, and are entirely different phenomena.

[@STJukes]

Of course if the sea level is higher that will just add to the tsunami height.

[@FrodosGardener]

But the point was that SLR will make such current defences less effective because they will be relatively lower than their design height

[@Gimblevalve]

Love your content guys.... Rarely disappointed, thanks4posting 👍

[@bobyoung1698]

The forest wall idea has merit if the trees can grow large enough to absorb a portion of the tremendous impact a tsunami brings. A series of earthen berms running in parallel with the shoreline might reduce some of that impact as well.

[@darwinwins]

a solution for those on the coast: build homes on top of the walls ... if a wave makes it up to the home, it means that the homes behind the walls are already goners as well.

[@jody024]

These walls are an eyesore and not eco friendly at all.

[@johnbev2336]

Would it help by finding a way to break the wave before it hits the wall.

[@thatfeeble-mindedboy]

If the seawall is ever overtopped, how does the water drain back into the sea?

[@yujirorasy]

It's crazy to think that this wall is not even enough save them in the future as bigger tsunami will eventually happened.

[@flamez_177]

I haven’t watched it yet but this is one of my favourite channels, your videos are amazing Hi from Australia

[@skipads5141]

Well, that makes the coastline beautiful and enjoyable.

[@danielwhyatt3278]

This flood defences truly are impressive and something we can imagine only Japan would be best Art. But still, it breaks my heart to see that so many towns have to be essentially flooded with these high rising concrete monoliths to protect them, yet at the same time taking away a lot of the soul of these places that true people to them in the first place. They could very well increase the moving of people from these coastal towns to the big cities. Only making the split between urban and rural even larger. I would love to live in Japan someday if I could, but I would never want to live in a town with a massive wall like this. They are definitely right that they should look at combining flood defences with greener options to lower the environmental and visual impact.

[@falsemcnuggethope]

I know little about Japan. Does the west coast have similar towns that don't need the protection?

[@FrodosGardener]

@@falsemcnuggethope the tsunami-genic fault is on the east coast where the Pacific plate is being subducted. The west is not subject to the hazard in the same way really.

[@karutonko3430]

Wall Maria has come to life

[@2MeterLP]

I know they are there to protect people, but living behind a four story tall grey concrete wall instead of having an ocean view just seems depressing. Is it really worth it to be safe from a disaster that hits every 100 years if it means you have to lower your quality of life for 100 years? I think I would prefer investing into early warning systems instead if I lived there.

[@FurnitureFan]

I'm sure there was at least one town that instead raised the town.

[@treefarm3288]

I worked in one of the flattened residential suburbs of Ishinomaki in 2012. At that point the council didn't know if it was going to allow owners of land to rebuild or rezone the area as light industrial. I don't know the outcome.

[@seasong7655]

The high walls really aren't very pretty. Architects and engineers need to do better!

[@LV-426...]

I like them. They look very solid and brutal. A symbolic punch back to the see.

[@encabsss]

I couldn’t agree more. Perhaps they should consider trees or vines that grow on the wall to make it look environmental friendly.

[@MrPrinceIsaac]

This was meant to slow down the waves to avoid too much damage, not to protect the coastal area from Tsunamis.

[@N4CR]

In Osaka a few years prior to this Tsunami (peak Japan as such), I saw these curious, old stone inscriptions, placed every few hundred meters over many kilometers, up in the hills above the new city area. What they had written on them was a warning to not build below this point, as a Tsunami in 1800s or prior had reached up to there. This wasn't 15m above the ground, it was hundred+ meters above sea level.. much, much larger than the latest Tsunami! Those who ignore history are doomed to repeat it.