What are your left wing manga/anime recommendations? I only got Ninpu Kamui Gaiden, because it is communist and ninjaic? You may shrug you shoulders, but a communist created all the ninja cliches, like a dude named Sasuke and the "Izuna Drop"! Unfortunately, the manga is from 1969, when the United States still had not erased all left-wing presence in Japan.
Ashita no Joe was actually written by a conservative. It's class conscious though.