Hello, I am not Japanese, so I can only read and understand a bit of the language. However, I wanted to tell you how much your post on Proto Pedia moved me. I have a friend who also has limited mobility and uses a wheelchair, so I know how difficult it can be to do daily rehabilitation. I could feel the love you have for your son in the video, and it was very touching. I work in the technology industry, and I often think about what I can do to help others. I really admire how you have used your expertise in electrical engineering to create such a fun and helpful product for people with disabilities. Thank you for sharing your story. It is an inspiration to me and to others.