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 31)
Origin Matsuyama, Ehime, Japan
Zodiac Sign Virgo Virgo
Professional Info
Genres J-pop
Occupation Singer-songwriter, guitarist, keyboardist
Years Active 2008–present
(11 years)
Label PINK RECORDS (2012-2014)
avex trax (2014-present)
Associated Acts Oomori Seiko & THE Pink Tokarev
Twitter Twitter_2012.svg @oomoriseiko

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 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]

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.[9]


  • Birth Name: Oomori Seiko (大森靖子)
  • Birth Date: September 18, 1987 (1987-09-18) (age 31)
  • Birthplace: Matsuyama,Ehime, Japan
  • Western Zodiac: Virgo
  • Eastern Zodiac: Rabbit

Song CreditsEdit

Ame no Mori Kawa UmiEdit


Kikkawa YuuEdit

Michishige SayumiEdit

Morning Musume 20thEdit

Up Up Girls (Kari)Edit

Yaguchi MariEdit



External LinksEdit

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