Maison B

 is a Japanese dance and vocal boy group produced by KEN THE 390 from the program "THE NEXT UP～次は君だよ" on Music Blood. All members were contestants on the audition program Produce 101 Japan Season 2.

All members of Maison B exited Produce 101 Japan Season 2 while being apart of the "B rank" class of trainees. Accordingly, the "B" in the group's name represents a reversal from the "B class", and the group's determination to always "break" the status quo.

They will officially debut with the EP Foundations on February 15, 2023. Their official fan name is "MBius".

Current Members

 * RICK ( Yasue Rick ) - Rap
 * LYU ( Kodama Ryusuke )- Vocal
 * REIJI ( Fukushima Reiji )- Rap
 * MASATO ( Ueda Masato ) - Vocal
 * TECO ( Tekoe Yusei )- Vocal
 * SHOYA ( Fukuda Shoya )- Vocal
 * HIKARU ( Vasayegh Hikaru ) - Vocal

EPs

 * 1) [2023.02.15] Foundations

Digital Singles

 * 1) [2023.01.18] Paradise
 * 2) [2022.08.19] Bringing Out
 * 3) [2022.11.18] Masquerade

Trivia

 * The group has a J-Urban sub-unit called roomR consisting of RICK and REIJI who perform alongside KEN THE 390 often.
 * Originally, KEN THE 390 planned to reveal only 5 members for Maison B to debut as a 5-member group from "THE NEXT UP～次は君だよ" .  The original planned lineup consisted of RICK, TECO, LYU, SHOYA and REIJI. HIKARU and MASATO were added to the group through the duration of the show after being  recommended by SHOYA and REIJI respectively.