羞恥心 (Shūchishin) is a Japanese idol vocal group formed as part of the variety show Quiz! Hexagon II produced by Fuji Television Network Incorporated. Originally meant to be a joke group, the trio has released singles that have hit the top 10 on both the Oricon and the Billboard Japan Hot 100 Singles. Shuchishin, whose name translates as "Shame", consists of the leader Takeshi Tsuruno with Naoki Nokubo and Yusuke Kamiji. The group's name comes from a mispronunciation of the word when it came up in a question on the show in mid 2007 (the word "shuchishin" was pronounced as "sajishin" (さじしん)).

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