For more details about Oomori Seiko's career, please visit her page on the Jpop Wiki.
Oomori Seiko
Oomori Seiko, March 2017
Birth Info
Born September 18, 1987 (1987-09-18) (age 32)
Origin Matsuyama, Ehime, Japan
Zodiac Sign Virgo Virgo
Professional Info
Genres J-pop
Occupation Singer-songwriter, guitarist, keyboardist
Years Active 2008–present
(12 years)
Label PINK RECORDS (2012-2014)
avex trax (2014-present)
Associated Acts Oomori Seiko & THE Pink Tokarev
Twitter Twitter_2012.svg @oomoriseiko
Instagram Instagram_logo_2016.svg @omorimori

Oomori Seiko (大森靖子) is a Japanese singer-songwriter who began her career in 2008. She is also the former lead singer, guitarist, and keyboardist for the band Oomori Seiko & THE Pink Tokarev. She's currently a member of ZOC.

She is a fan of Hello! Project and Michishige Sayumi in particular,[1] and she has written songs for various UP-FRONT GROUP artists since 2014.


Oomori Seiko was born on September 18, 1987 in Matsuyama, Ehime, Japan.[2] Her father was a civil servant and her mother was a teacher.[3]

Oomori loved singing since she was a child and often imitated SPEED, Morning Musume, and Hamasaki Ayumi when she saw them on TV, but she did not believe she could become a singer if she was not cute.[4] When Oomori entered elementary school, her parents enrolled her in painting, calligraphy, and piano lessons. She then went to a private middle school and high school, where she was bullied and distanced by others for being strange.[3] Oomori graduated from high school in 2006 and decided to enter Musashino Art University in Tokyo.[4]

When she was 19, Oomori came across the live house Muryoku Muzenji, which showed her the way of music and allowed her to express her interests without judgement.[3][4] She eventually quit university in 2007 to instead pursue a music career.[2]

In 2011, in addition to performing solo, Oomori formed a band with a four others named Oomori Seiko & THE Pink Tokarev. They disbanded on May 12, 2015.[5][6]

In 2014, Oomori made her major debut under avex trax on March 14[7] and also began writing songs for other artists.

In August 2014, Oomori got married. On October 10, 2015 she gave birth to her first child, a son weighing 3082 grams.[8]

In September 2018, she became a member and producer of the idol group ZOC.[9]

On January 20, 2019 it was announced that Michishige Sayumi would be a featured artist in Oomori's single "Zettai Kanojo feat. Michishige Sayumi" released on March 13.[10]


  • Birth Name: Oomori Seiko (大森靖子)
  • Birth Date: September 18, 1987 (1987-09-18) (age 32)
  • Birthplace: Matsuyama, Ehime, Japan
  • Western Zodiac: Virgo
  • Eastern Zodiac: Rabbit

Song CreditsEdit

Ame no Mori Kawa UmiEdit


Kikkawa YuuEdit

Michishige SayumiEdit

Morning Musume 20thEdit

Saho AkariEdit

Up Up Girls (Kari)Edit

Up Up Girls (2)Edit

Yaguchi MariEdit



  1. "元モー娘。道重さゆみ 歌手・大森靖子のツイートきっかけに「会いたい」続々" (in Japanese). Tokyo Sports. 2016-03-11.
  2. 2.0 2.1 "【ブレーク予報】大森靖子、目標2年「ファンと一体」武道館" (in Japanese). Hochi Sports. 2014-11-03. (Archived)
  3. 3.0 3.1 3.2 "ブレイクスルー File.19 音楽は魔法ではない でも音楽は… ―シンガーソングライター 大森靖子―" (in Japanese). NHK Fukushi Portal Heart Net. 2014-12-01.
  4. 4.0 4.1 4.2 "世界を変えるアーティストを! NEW SENSATION!" (in Japanese). OTOTOY. 2013-03-25.
  5. "大森靖子&THEピンクトカレフが解散" (in Japanese). natalie. 2015-02-06.
  6. "大森靖子&THEピンクトカレフとどめの一発、新宿LOFTで“最終公演”" (in Japanese). natalie. 2015-05-18.
  7. "大森靖子、エイベックスからメジャーデビュー決定" (in Japanese). natalie. 2014-03-14.
  8. "大森靖子が第1子男児を出産、16年2月ワンマンライブ開催も発表" (in Japanese). Sponichi. 2015-10-10.
  9. "“支配領域”新グループZOC始動、共犯者・大森靖子の「生誕祭」に登場" (in Japanese). natalie. 2018-09-18.
  10. "[1]" (in Japanese). natalie. 2019-01-20.
  11. "大森靖子「IDOL SONG」Music Video" (in Japanese). Oomori Seiko Youtube Channel (via YouTube). 2017-08-23.
  12. "Seiko Oomori Cheers on Idols Using Their Own Words in “IDOL SONG”!" Tokyo Girls' Update. 2017-08-30.

External LinksEdit

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