Naofumi Yamamoto (山本 尚史 Yamamoto Naofumi, born August 1, 1977) is a Japanese professional wrestler and former boxer. Yamamoto started his professional wrestling career under his real name in October 2002 with New Japan Pro Wrestling (NJPW), where he remained until 2007, when he signed with WWE. In 2009, Yamamoto left WWE's developmental territory to join the promotion's main roster under the ring name Yoshi Tatsu. After his June 2014 release from WWE, Yamamoto returned to NJPW the following October, now performing under the ring name Yoshitatsu.
With a sports background in boxing and jujutsu, Yamamoto passed an audition held by New Japan Pro Wrestling (NJPW) in September 2001 and began training professional wrestling at the promotion's dojo the following March. During his training, Yamamoto also travelled to Los Angeles to train at the local NJPW dojo. Yamamoto made his in-ring debut on October 12, 2002, facing Wataru Inoue in Korakuen Hall.