After watching Rika Matsumoto perform Ash Ketchum, Sakai decided he wanted to be a voice actor, which he did and made his debut in 2013.

Some of the major roles Sakai has had since are Mitsumune in The Lost Village, Nobunaga Oda in Nobunaga Teacher's Young Bride, Sakuya Sakuma in A3!, and Shaun in Shadows House.

[1][2][3] In elementary school, Sakai was a fan of the Pokémon series, especially Rika Matsumoto's performance as Ash Ketchum, which would inspire him to become a voice actor.

While working as a salaryman, he started watching anime again, which inspired to try voice acting again and quit his current job.

[4] He was later hired by Early Wing, where he made his voice acting debut as a caretaker in Karneval.