I’ve never looked into the plywood standards/ratings for the US so I don’t know how they compare, and this will probably have no interest for most of you, but I threw together this web page on Japanese plywood as a personal-information project while residing my house this year. I don’t mean it to serve as a technical source, mostly general information for the non-Japanese-enabled expats here (Japan) who might need to use some plywood in a project.