U

Name: U
Native name: 유우
Also Known as: ゆう, 川崎優
Nationality: Japanese
Gender: Female
Born: August 21, 2008
Age: 18

Kawasaki Yu, professionally known as U, is a Japanese singer, dancer, former member of DDDD 25 (딴따라 25) and current member of OURBIRTHDAY (아워벌스데이).

In July 2023, she entered the SBS survival show "Universe Ticket" but was unable to debut in the resulting debut group after being eliminated in the second round.

In 2024, she participated in the JYP Entertainment and KBS2 survival show "The Entertainer", ranking 3rd overall, earning her a spot in the resulting debut group "DDDD 25". After the show, she signed a contract with INNIT Entertainment (INNIT엔터테인먼트). It is assumed that DDDD 25 quietly disbanded during pre-debut due to inactivity and the members debuting under different groups.

In July 2026, INNIT Entertainment announced her to be a part of the lineup for their girl group "OURBIRTHDAY" under the stage name "U". They released the pre-debut single "Hungry (Side A)" on July 22, 2026.

(Source: MyDramaList) Edit Biography

Year	Title	#	Role	Rating
2026	OURBIRTHDAY Party Korean TV Show, 2026, 1 eps (Regular Member)	1	Regular Member	0.0
2024	The Entertainer Korean TV Show, 2024, 11 eps [Contestant] (Regular Member)	11	[Contestant] Regular Member	8.0
2023	Universe Ticket Korean TV Show, 2023, 10 eps [Contestant] (Regular Member)	10	[Contestant] Regular Member	7.3