He attended Tokyo Metropolitan Mukogaoka High School, where he participated in the Light Music club.

He made his solo debut with the opening theme "Life is SHOW TIME" from Kamen Rider Wizard.

Kiryūin lists his hobbies and interests as meat, bread, alcohol, ramen, manga, adult videos, detective games, and 1990s J-pop.

Due to his wife's uninvolvement with the entertainment industry, he asked that fans respect her privacy and not harass either party's extended families.

[3] On August 12, 2024, He announced through his official social media account that he and his wife had welcomed the birth of their first child, Kiryūin did not disclose the gender of their baby in consideration to the future.