Kawaguchi Yurina

 (Kanji: 川口ゆりな; Hangul: 카와구치유리나) is a former member of X21 and a contestant on MNET's girl group survival show, Girls Planet 999 as of July 2021.

2016 - 2018: X21
She joined X21 in April 2016 as a 2nd generation member and was among the final lineup when the group eventually disbanded.

2021: Girls Planet 999
In May 2021, she was spotted in South Korea and was identified as a possible contestant on MNET's girl group survival show Girls Planet 999.

Later on July 8, 2021, she was officially identified and confirmed as a contestant.

She ranked 9th out of the Japanese trainees during the signal song evaluation. In the first elimination round, she ranked 1st place. In the second elimination round, she ranked 2nd place, behind trainee Shen Xiaoting

Singles

 * Natsu dayo!!
 * Kagami no Naka no Parallel Girl
 * Genjitsu kara Nigeru kara Genjitsu ga Tsurainda
 * Friday Night Party
 * Destiny

Digital Singles

 * O.O.O

Trivia

 * Her MBTI personality type is ESFJ.
 * Her hobbies are listening to music, watching anime and movies.
 * Her specialties are golf and playing the flute.
 * Her role model is TWICE.