Seki Yumiko
関有美子(せき ゆみこ)
Seki Yumiko BAN .jpg
Seki Yumiko, BAN - 2021
Nickname Yumichan (ゆみちゃん?)
Yumine (ゆみねぇ?)
Birthdate June 29, 1998 (1998-06-29) (age 22)
Birthplace Fukuoka, Japan
Bloodtype A
Zodiac Sign Cancer.png Cancer
Height 167cm
Professional Information
Genres J-Pop
Occupation Singer, Idol
Years Active 2018-present
(2 Years)
Agency Seed & Flower
Group Sakurazaka46
Generation 2nd Generation
Associated Acts Sakurazaka46
Blog Official Blog
Showroom Icon.png SHOWROOM

Seki Yumiko is a member of Sakurazaka46's 2nd Generation.


Singles Participation

Sakurazaka46 B-Sides

Other Singles

Albums Participation

Keyakizaka46 Albums

Media Appearances

Variety Shows


  • Her audition SHOWROOM number was #40
  • Lightstick colors: White, Orange
  • Favorite things: Take a train or bus while listening to music (especially like a band with a piano), sleeping a lot, seeing idols.
  • Favorite Food: Ramen (specifically Tonkatsu Ramen)
  • Favorite Manga: One Piece, Hunter x Hunter, and Tokyo Ghoul
  • Favorite Artist: Kenshi Yonezu
  • Keyakizaka46 Oshimen: Watanabe Rika
  • If she were to compare herself to something, it would be a cup.
  • Was a model with the "NEXT MODEL COLLEGE" agency prior to joining Keyakizaka46, and walked for FACo (Fukuoka Asia Collection) Fashion Show.
  • Was an avid fan of Keyakizaka before joining and went so frequently to handshake events that she was recognized by members. She also collected photos of her oshimen, Watanabe Rika.
  • Never danced before joining Keyakizaka
  • Was a member of the brass band and plays alto saxophone.
  • She is a fan of the SoftBanks Hawks baseball team
  • Doesn't like smiling with her teeth in photos, but when other members take the photo, her laugh comes out naturally
  • Called "Yumiko Chairman" due to her high-class background. On Episode 244 of Keyaki tte, Kakenai? she revealed that she randomly received a MacBook Pro and Saxophone as a gift despite it not being her birthday.




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