About Yakkun Sakurazuka
Yasuo Saitō, also known by the stage name Yakkun Sakurazuka, was a Japanese comedian, singer, and voice actor. The team broke up in 2005, but they reunited in 2006 on the show Enta no kami-sama, where Saitō appeared for the first time as Sukeban Kyoko, a delinquent schoolgirl always seen carrying shinai bamboo sword. He published his first book, 桜塚やっくんの都市伝説工場 (Cleavage or, literally, Urban Legend Factory), in 2008.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.