Not sure why Japan need antifas unless it's do defend the only class subject to social discrimination in Japan.
inorities constitute 4% of Japan’s 127 million citizens. The Buraku are the largest minority, but there are also 650,000 Korean nationals, apart from the Ainu people (the aboriginals). The Buraku Liberation League established estimates their number to be around 3 million – many times more than the official estimates. The Buraku are concentrated in the Western part of Japan and they constitute 10% of people in Osaka and Fukuoka prefectures.
Don't thie JPantifa had Eta in mind.
Since the Eta are not considered human, the were exempt from taxes.
https://en.wikipedia.org/wiki/Burakumin