2023–present (South Korea)
Shibu3 project- 2017–2018
Ruka made her debut as a member of the Blue Class of the Japanese idol group Shibu3 project as one of the founding members on March 26, 2017. She left the group around the end of 2018.
Debut with BABYMONSTER- 2023
- YG Entertainment released a teaser poster on December 30, 2022, announcing their plans to debut a new girl group.
- The name of the group was confirmed as BABYMONSTER on January 1, 2023. Ruka was seen practicing in the same video, seemingly confirming her membership in the group.
- Ruka was introduced as the seventh and final member of BABYMONSTER during a live performance on February 6.
Music video appearancesUeda Atsumi - "Happy Halloween!" (2017)
- Ruka was born in Japan.
- She is a Japanese national.
- In 2018, she joined YG Entertainment and become a trainee until now.
- According to one of the dancer instructors, LEEJUNG, Ruka's strength is her experience and understanding of dance.
- She is good at Hip-hop dancing.
- The former CEO of YG Entertainment even claimed she was so good that he had never critiqued her dancing.
- In her spare time, she enjoys dancing in her dorm.
- She drinks milk as part of her morning routine.
- She is fluent in Japanese, Korean, and English.
- Along with fellow member Asa, she will be one of the first female Japanese idols to debut under YG Entertainment.