If any of the Wikipedians here would like to take this up, I think the Japanese Buddhist Pacifist should probably have his own Wikipedia Page.
Here are some links to scholarship in English about him for reference:
- https://digitalcommons.bucknell.edu/cgi/viewcontent.cgi?article=1276&context=fac_books (which is Chapter 12 of this book)
Here he is on ja.wikisource if that’s any help: 作者:井上秀天 - Wikisource
Sadly my IP address here in Thailand is blocked from making Wikipedia edits, so I’ll have to rely on your kindness.