[Josh Grisdale]

In your research, you you may have came across the following sites:

• https://www.mhlw.go.jp/english/policy/care-welfare/welfare-disabilities/assistance_dogs/index.html
• https://www.moudouken.net/en/

I would suggest contacting them as your first option as they can let you know what certification you can get (or not get) in your situation.

As for laws etc, I strongly recommend getting in touch with DPI (Disabled People’s International) Japan branch: https://www.dpi-japan.org/en/