One N' Only is a 7 member group formed by Stardust Promotion, home to groups such as Bullet Train and PrizmaX. The group which is composed of the of EBiSSH and Satori Boys Club (SBC) was formed after EBiSSH and SBC went on tour together in April 2018. They debuted a month later with I'M SWAG.

They have had great success since their debut: their music videos reaching a million views in less than 24 hours and their single Dark Knight placing first on both the Oricon chart and Japan Billboard Top 100.

Their fandom name is Swag.

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Name: Sawamura Rei

Stage name: Rei

Birthday: January 2nd 1997

Height: 5 ft 10

Position: Vocalist

He's a member of EBiSSH

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Name: Seki Tetsu

Stage name: Tetta

Birthday: November 24th 1997

Height: 5 ft 7

Position: Vocalist

About him:

He's a member of EBiSSH

Fun facts:

He likes to kiss his

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Name: Kusakawa Naoya

Stage name: Naoya

Birthday: April 6th 1998

Height: 5 ft 9

Position: Dancer

He's a member of EBiSSH

Fun facts:

He has a brother from Bullet Train (Takuya)

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Hayashi Koki

Stage name: Kohki

Birthday: January 15th 1999

Height: 5 ft 11

Position: Dancer

He's a member of EBiSSH

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Name: Kimikura Kenshin

Stage name: Kenshin

Birthday: July 8th 1999

Height: 5 ft 9

Position: Rapper, dancer

He's a member of SBC

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Name: Takao Hayato

Stage name: Hayato

Birthday: 17th September 1999

Height: 5 ft 9

Position: Rapper, dancer

He's a member of SBC

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Name: Yamashita Eiku

Stage name: Eiku

Birthday: 19th December 1999

Height: 5 ft 6

Position: Vocalist

He's a member of SBC

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