Izumi Kashii plays drums in the boyband JAXX/JAXX. He is the oldest and tallest member, standing at 185cm tall. Despite his stature, his demeanor is consistently calm and reserved, often leading other group members to direct or influence his actions.

Before joining JAXX/JAXX, he was active in the idol group Popping Zoo under the Groovy Production agency alongside four other members. His known personal fears include heights and insects.