Tanaka Kouko (田中皓子) is a Japanese pop singer and Idol managed by STU. She is currently a first generation member of STU48.
- Birth Name: Tanaka Kouko (田中皓子)
- Nicknames: Kokko (こっこ), Kouko (こーこ)
- Date of Birth: June 16, 1996
- Place of Birth: Saga, Japan
- Blood Type: A
- Height: 159cm
- Bands / Groups:
STU48 Song Participation
AKB48 Song Participation
- Currently a first generation member of STU48.
- Prior to STU48, she was a member of the Saga-local idol group NEXT GIRLS from 2014 to 2015.