|Birthdate||February 23, 2004|
|Current Age||15 Years Old|
|Idol Career Info|
|Debuted||September 7, 2019 / Sakamichi Kenshusei|
Yamaguchi Haruyo is a member of Sakamichi Kenshusei
- Her audition SHOWROOM number was #77. Her nickname during the auditions was Nana-chan (ななちゃん).
- Her favorite members are Yoda Yuki, Hirate Yurina and Kakizaki Memi.