Natsuko was a member of SDN48's 2nd Generation. She is now affiliated with Asia Business Partners Inc.
- Her real name is Ōki Natsuko (大木 奈津子).
- She is the twin sister of Akiko.
- After graduation, formed the duo Natsuaki with Akiko.
- She obtained the qualification of "Home Appliance Advisor" in 2015. Since then, she has been serialized in various publications reviewing and talking about home appliances.
- On December 8, 2018, she announced her marriage.
- She gave birth to her first child on May 22, 2021.
- SDN48 2nd Generation → Graduation
- Joined SDN48 as a 2nd Generation member on May, 2010
- Graduated on March 31, 2012
- SDN1 (Yuuwaku no Garter)
- Black boy
- I'm sure
Natsuko after her graduation (2017)