I have a bunch of Japanese and some Russian language martial art books for sale on Ebay.

This Judo kata book (already has one bid), this jujutsu book from 1914, a wartime randori no kata judo book, two Russan sambo books you'll not likely find easily, and some others if you skim through my sales. I'll be listing some more Japanese language budo/bushido books from the mid 20th century if there's interest.