Tosa came to Korea because Korea was occupied by Japan for over thirty years. Yakuza are still quite strong in Korea. China was also occupied for quite some time. At the same time the only place in Moaist China where Japanese Organized crime had any foothold was Hong Kong (technically not inside China until 1997.) Regardless, all true Tosa at the time where registered in the Sudo registry. Do any of you really think that John Swinford was connected to Japanese Organized crime in America in the 1960's? A highly unlikely story.