1 Believe FNC

1 Believe FNC is a co-ed dance and vocal group split into 1-Girls (female members) and STEFA (male members). They also contain FUTURE, composed of the group's first generation members, SWEET, composed of second and later third generation female members, and TRUST, a miscellaneous sub-unit.

1-Girls

 * Chika (FUTURE)
 * Reira (SWEET, 2nd Gen)
 * Haruka (SWEET, 3rd Gen)
 * RIRIA

STEFA

 * EISU
 * TOMOYA (3rd Gen)
 * YU-GA
 * TAKATO
 * SEAN

Former Members
(Incomplete)
 * SUZU (FUTURE)
 * SAYA (FUTURE)
 * URARA (FUTURE)
 * MOMOKA (FUTURE)
 * MANAMI (FUTURE)
 * SAYAKA (FUTURE)
 * IROHA (FUTURE)
 * AYANE (FUTURE)
 * JUNA (SWEET, 2nd Gen)
 * RINKA (SWEET, 2nd Gen)
 * SHINO (SWEET, 2nd Gen)
 * RIRIKA (SWEET, 2nd Gen)
 * SAKI (SWEET, 2nd Gen)
 * MIYUU (SWEET, 2nd Gen)
 * MEI (SWEET, 3rd Gen)
 * TAKUYA (3rd Gen)

Mini Albums

 * [2017.04.19] ONE STEP

Singles

 * [2016.04.27] START
 * [2018.08.01] Happy Days

Albums

 * [2013.08.21] Seriousness ~Seriousness "Honki"~ (Seriousness～シリアスネス「本気」～)

Mini Albums

 * [2014.02.19] Kimi to Nara... (君となら…)
 * [2015.05.20] Look at the sky☆ (Sora wo Miagete) (Look at the sky☆ (空を見あげて))

Mini Albums

 * [2015.05.20] ☆Daisuki na no☆ (☆大好きなの☆)

Singles

 * [2014.02.05] Go Go Go

Best Albums

 * [2019.09.18] 1-G BEST

Singles

 * [2020.02.19] Kitto... Ano Saki ni (きっと・・・あの先に)

Mini Albums

 * [2017.12.20] LOVE

Singles

 * [2019.09.18] Aishiteru... Kimi wo (愛してる…君を)
 * [2020.02.19] Seishun (青春)