Kei Tani (谷啓, Tani Kei) (born Yasuo Watanabe (渡部 泰雄, Watanabe Yasuo) ; 22 February 1932 – 11 September 2010) was a Japanese comedian, actor and musician.

[2] In 1956, he joined the comic-jazz band The Crazy Cats with Hajime Hana and Hitoshi Ueki.

[1] Some of his nonsense one-word gags, such as "gachon" became buzzwords imitated throughout the nation.

His real name was Yasuo Watanabe,[3] but his stage name, especially with the Japanese name order "Tani Kei," was based on a pun on the name Danny Kaye.

He died of a brain contusion on 11 September 2010 after falling down the stairs in his Mitaka home.