Not too unusual for people involved with the showa new left to get more right wing over time; one of the main guys in Ryu Ota's far-left anti-Japaneseism circles (way more extreme than Oshii was) supported visiting Yasukuni Shrine later since "the right shouldn't monopolize it"
https://ja.wikipedia.org/wiki/%E5%B9%B3%E5%B2%A1%E6%AD%A3%E6%98%8E (and Ota himself became a "jews are lizards" guy). Then you have Yasuhiko Yoshikazu:
>His final message addresses Japanese youth participating protests against the recent security bill, which will allow the reinterpretation of Japan's Peace Constitution as well as the military aid of foreign countries in wartime. While he congratulates them on protesting peacefully, he says, "It's a shame if they are caught up in a single-minded pursuit of ideas such as 'protect (war-renouncing) Article 9 (of the Constitution)' and 'preserve (Japan as) a peaceful country.' For example, I hope they think for themselves from now on about how we deal with things like the Islamic State extremist group."Honestly I'd unquestionably respect people like Oshii if they kept their views from back then but just criticized modern trendy idpol & hyper-sensitivity culture (not just Oshii, I know Yasuhiko criticized modern feminism) but "disillusionment with the left" tends to result in dumb neocon stuff too like that quote above
What I realized is that it's hard for people to really hold on to their own individual sociopolitical values without falling into generic "I think this so I must also think this other thing" means of thinking and when they do they can have detached antisocial tendencies that result in immoral behavior ex. Yamamoto Yohane's sex pesting