石川梨華 (Ishikawa Rika) is a Japanese singer and talent signed under J.P ROOM. She is best known as a former idol under Hello! Project as a 4th generation member of Morning Musume. and the leader of the former group v-u-den. 石川梨華 (Ishikawa Rika) is a Japanese singer and talent signed under J.P ROOM. She is best known as a former idol under Hello! Project as a 4th generation member of Morning Musume. and the leader of the former group v-u-den.