| idol_id | 2053 |
| Selca owner | |
| Pop type | K-pop |
| Stage name (romanized) | U |
| Stage name (original) | 유 |
| Real name (romanized) | Kawasaki Yu |
| Real name (original) | 川崎 優 |
| Birth date | 2008-08-21 (age 17) ▲ ▼ |
| Chinese zodiac sign | 🐀 Rat |
| Western zodiac sign | ♌ Leo |
| Hometown | Chiba |
| Height | |
| Weight | |
| Blood type | |
| MBTI | INFP |
| Debut date | 2026 ▲ ▼ |
| Country of origin | 
Japan |
| Name | Company | Fandom | Debut date | Disbandment date | Current member | |
|---|---|---|---|---|---|---|
| OURBIRTHDAY (아워벌스데이) | Innit Entertaintment | 2026 | Yes |