Wikipedia
Zaitokukai
Zaitokukai, full name , is a Japanese anti-Korean hate group political organization that seeks to eliminate perceived privileges extended to Zainichi Koreans and hold South Korean or North Korean citizenship. Its membership between 9,000 to over 15,000, and the Western media has called them "J-racism's hottest new upstarts."
It was founded and led by a man who goes by the assumed name, Makoto Sakurai. On November 16, 2014, Yasuhiro Yagi was selected as chairman for the fifth term as the result of a vote of confidence by the group's members. It is considered an extremist group.