ONLY ONCE, ONLY 7TH. was the sixth live by the IDOLiSH7 franchise, held at the Yoyogi National Gymnasium. It was a celebration of the franchise's seventh anniversary and it marked a special milestone as the number "7" is very a significant number within IDOLiSH7. The theme was "parade".

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Main Cast: Toshiki Masuda, Yusuke Shirai, Tsubasa Yonaga, KENN, Atsushi Abe, Takuya Eguchi, Kensho Ono, Wataru Hatano, Soma Saito, Takuya Sato

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