OKAMOTO'S

Members:
- Shou Okamoto (オカモトショウ) - vocals
Real name Shou Iimura (飯村 翔). Born October 19, 1990 in New York City. Former member of Zutto Zuletellz (ズットズレテルズ) and children's performance group Precoci. Son of American jazz saxophonist Scott Hamilton.

- Kouki Okamoto (オカモトコウキ) - guitar
Real name Kouki Hayashi (林 幸希). Born November 5, 1990 in Nerima City, Tokyo, Japan.

- Hama Okamoto (ハマ・オカモト) - bass
Real name Ikumi Hamada (濵田 郁未). Born March 12, 1991 in Tokyo. Former Zutto Zuletellz member. He is the eldest son of Masatoshi Hamada and Natsumi Ogawa.

- Reiji Okamoto (オカモトレイジ) - drums
Real name Reiji Miyake (三宅 零治). Born January 9, 1991 in Futako-Tamagawa, Setagaya, Tokyo. Former Zutto Zuletellz member. He is the eldest son of the Japanese rock band The Privates lead singer Tatsuji Nobuhara (延原達治). In his childhood he made child role dramas.

Former members:
- Masaru Okamoto (オカモトマサル) - bass
Left the band in 2009.