IDOLiSH7 7th Anniversary Event "ONLY ONCE, ONLY 7TH"

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".

• Toshiki MasudaIori Izumi
• Yusuke ShiraiYamato Nikaido
• Tsubasa YonagaMitsuki Izumi
• KENNTamaki Yotsuba
• Atsushi AbeSogo Osaka
• Takuya EguchiNagi Rokuya
• Kensho OnoKensho Ono
• Wataru HatanoGaku Yaotome
• Soma SaitoTenn Kujo
• Takuya SatoRyunosuke Tsunashi
• Soichiro HoshiMomo
• Shinnosuke TachibanaYuki