Yū Kawasaki, known professionally as U, is a Japanese singer under INNIT Entertainment. She is a member of the girl group OURBIRTHDAY and a former member of the pre-debut girl group DDDD 25. She is also known for being a contestant in the survival shows Universe Ticket (2023) and THE DDANDDARA (2024). (오뜨랑에서 실시간으로 번역된 한글 프로필도 확인할 수 있어요) 2024년 더 딴따라에 출연했다. 2023년 유니버스 티켓에 출연했다.