IDOLiSH7 7th Anniversary Event "ONLY ONCE, ONLY 7TH"
6h 5m·
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".
| Actor | Role |
|---|---|
 Toshiki MasudaIori Izumi | Iori Izumi |
 Yusuke ShiraiYamato Nikaido | Yamato Nikaido |
 Tsubasa YonagaMitsuki Izumi | Mitsuki Izumi |
 KENNTamaki Yotsuba | Tamaki Yotsuba |
 Atsushi AbeSogo Osaka | Sogo Osaka |
 Takuya EguchiNagi Rokuya | Nagi Rokuya |
 Kensho OnoKensho Ono | Kensho Ono |
 Wataru HatanoGaku Yaotome | Gaku Yaotome |
 Soma SaitoTenn Kujo | Tenn Kujo |
 Takuya SatoRyunosuke Tsunashi | Ryunosuke Tsunashi |
 Soichiro HoshiMomo | Momo |
 Shinnosuke TachibanaYuki | Yuki |
 Yuya HiroseHaruka Isumi | Haruka Isumi |
 Subaru KimuraToma Inumaru | Toma Inumaru |
 Koutaro NishiyamaMinami Natsume | Minami Natsume |
 Takashi KondoTorao Mido | Torao Mido |