sentences:  He began boxing at age 14 and was undefeated in 12 fights as a professional, before losing his 13th bout the day before the Japanese attack on Pearl Harbor (December 6, 1941).Townsend's American friends quickly deserted him after learning that he was half Japanese and Townsend decided to end his professional career to become a trainer.Townsend first traveled to Japan in 1962 at the invitation of Japanese professional wrestler Rikidōzan, who wanted Townsend to teach boxing at the Rikigym.