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Diamond Yukai (ダイアモンド✡ユカイ, Daiamondo Yukai, b. March 12, 1962) is a rock singer and actor. He was born Yutaka Tadokoro
(田所豊 Tadokoro Yutaka) in Tanashi, Tokyo, Japan. He is the vocalist for the long term existing Japanese rock band Red Warriors. He has acted in the Hollywood films Tokyo Pop and Lost in Translation and is often seen on television variety shows.
He appeared in the following movies:
Tokyo Pop (1988) in role of Hiro as partner of Carrie Hamilton (Wendy),
Toy Story (1995) singing the Japanese version of "You've Got a Friend in Me",
Non-Stop/Dangan Runner (1996),
Lost in Translation (2003)