Kenichi Shinoda has also spent time in jail for killing a man with a sword The head of Japan's biggest yakuza crime syndicate has been freed from jail after almost six years. Kenichi Shinoda was jailed for illegal gun possession shortly after taking over the Yamaguchi-gumi - a gang with an estimated 35,000 members. Japan's police, who have vowed to crack down on the yakuza, say they now expect "ag