Hey! I just scanned and uploaded a collection of Genpei Akasegawa's left wing political cartoons from the 1970s. You can find it here:
https://archive.org/details/sakura-illustrated-collectionIt contains Concerned Theatre Japan's English translation of the special issue. Although I didn't realize it was already on mangadex:
https://mangadex.org/title/43800/sakura-illustrated/comments/More information about both Genpei Akasegawa's manga/illustration work as well as Concerned Theatre Japan:
https://throwoutyourbooks.wordpress.com/2015/11/03/political-comics-japan-radicalism-protest-movements-manga/https://tokyostages.wordpress.com/2014/12/21/concerned-theatre-japan/>>5164You are most welcome! Again I hope scanlators will pick it up at some point; do please share it with other people.
>>5171Yeah, scholarship on Japanese Old/New Left movements are pretty scarce. Aside from Gavin Walker and Patricia G. Steinhoff, there are few contemporary English-speaking scholars who're actually talking about them. From a cursory glance, New Left schisms from the JCP seem very similar to the Trotskyist splinter sects from CPUSA just a few decades prior only much, much more violent. I'm sure a Paul Le Blanc type figure could write a multi-volume series on them alone. Gavin Walker actually has a new book that came out recently; it contains translations of essays on the "Japanese '68"—here's an epub.