Thx Ben.
US Citizens and Green Card Holders have so many unique issues to deal with, that it may be better to bring them into a space away from the general population
PFIC
Brokerage Accounts (or inabilty to open one in Japan)
IRS & US Taxes
etc..
Then we can assume anyone posting there needs a response specific to US restrictions

:
:
This Guide to Japanese Taxes, English and Japanese Tai-Yaku 対訳, is now a little dated:
https://zaik.jp/books/472-4
The Publisher is not planning to publish an update for '24 Tax Season.