OurbirthdayMain Rapper
U
유Kawasaki Yu (川崎優)
Main rapper of Ourbirthday, a Japanese member from Chiba who competed on Universe Ticket and The Ddanddara before debuting.
- Age
- 18
- Aug 21, 2008
- Height
- 158 cm
- 5′2″
- MBTI
- INFJ
- self-reported
- Debut
- 2026
- with Ourbirthday
At a glance
Profile
- Stage name
- U (유)
- Birth name
- Kawasaki Yu (川崎優)
- Position
- Main Rapper
- Birthday
- August 21, 2008 (age 18)
- Zodiac sign
- Leo
- Chinese zodiac
- Rat
- Height
- 158 cm (5′2″)
- MBTI
- INFJ
- Nationality
- Japanese
- Birthplace
- Chiba, Japan
- Representative emoji
- 🍮
8 facts
About U
U, born Kawasaki Yu in Chiba, Japan, is Ourbirthday's main rapper. She competed on the survival shows Universe Ticket and The Ddanddara — where she placed third alongside future member Cho Hyejin as the duo DDD25 — before joining Innit Entertainment in January 2025. She was introduced with the second half of the group's pre-debut reveal.
- 01
Born in Chiba, Japan; her given name, Yu, means "kindness" in Japanese.
- 02
Competed on the survival shows Universe Ticket, where she was eliminated in the fourth episode, and The Ddanddara, where she placed third.
- 03
Was part of the pre-debut group DDD25 with member Cho Hyejin, presumed to have disbanded without debuting in late 2025.
- 04
Trained at NEXTinDANCE Academy and SONA Dance School.
- 05
Speaks Japanese, Korean and English.
- 06
Was part of "Hungry (Side B)"'s promotions.
- 07
Expresses her creativity by making custom T-shirts when she can't find clothes she likes.
- 08
Represented within the group's "WHIP!" mascot concept by the character Tirumico and the dessert flavor tiramisu.
1 track
Solo & unit tracks
Songs on Ourbirthday releases that feature U on her own or in a unit.
- Single album
“Hungry (Side B)”
originally performed as the group's second pre-debut single by Kuk Chorok, Shin Hyewon, U and Kilala · Our Birthday
6 other members