Yurina Kumai

Kumai Yurina was one of the 15 winners of the 2002 Hello! Project Kids auditon.
She was chosen as one of the members of Berryz Koubou.

Kumai, Mitsui Aika, Sugaya Risako and Nakajima Saki were chosen to join a sub-group called Guardians 4. The group focused on songs for the anime Shugo Chara!.
Kumai was put in the revival of Tanpopo with Kamei Eri, Mitsui Aika, and Okai Chisato.

She was chosen to promote the rock band Base Ball Bear's new album, "(WHAT IS THE) LOVE & POP" in a TV commercial that features only her, this is her first time doing a solo CM. Some fans speculated that one of the reasons Kumai might have been chosen is for her surname: Kumai = Kuma = Bear, other rumours also saying that Base Ball Bear found out about Berryz Koubou by checking out their CD's in a music store where Berryz Koubou was next to them. She also left a comment on the official BBB site: "Love&POP contains many up-tempo songs, and the whole album conveys a lot of power. My favorites are "Stairway Generation" and "Umi ni Naritai pt2! I had these on loop. I'd definitely like to go to their concert as well." Base Ball Bear is a Japanese rock band under EMI Music Japan. Since two days ago when the CM appeared on YouTube, a record of over 12 million views and over 80 comments. The majority of users left comments like Kumai-chan is "kirei" and "kawaii" written in English and Japanese.

On July 25 it was announced that Berryz Koubou's Kumai Yurina, Shimizu Saki, Sudo Maasa, Sugaya Risako and ℃-ute's Yajima Maimi, Nakajima Saki and Hagiwara Mai will be performing in an stage play titled Cat’s Eye based on a manga. The stage play will run from 9/22 till 9/30.