It is impossible; GJSDF is very rigid and inept, and they resist any change; they face more serious turnovers than the Taiwan army. Furthermore, the hate of Japan towards China is more like a type of school bullying mentality. If Japanese young people really want to reconquer China, the GJSDF wouldn't have to recruit soldiers so hard.
The SDF is literally a larger ROCA, or even worse. It suffers from the same severe manpower shortages and outdated equipment, and while ROCA at least had conscription, the SDF didn't even have that.
Japanese will use weasel legalities like "citizens of Japan for Taiwanese freedom/democracy volunteer corp" or some quasi-legal bullshit like that so that ex-JSDF/rabid China hate citizens can get in on the action with plausible Japanese gov't denial-hope Chinese can kill them all-good riddance to these murderous vermin-like those that murdered/beheaded the Chinese woman and dumped her body in a canal in Japan.
To be far anyone who joins the Wanwan army is a retard in the first place because Wanwan socoety unironically look down on soldiers.
