Justin Tomimori is a Japanese actor and voice actor known for his work in both live-action television and anime. He was born on June 27, 1989, in Saitama, Japan, and is of Japanese-Australian heritage. Standing at 183 cm, he began his entertainment career in 2008. His career experienced a brief hiatus when he announced his retirement from the entertainment industry in March 2021 to pursue other interests, but he returned to acting in 2023.

Tomimori is perhaps best recognized for his live-action role as Shun Daimonji in the 2011 tokusatsu series Kamen Rider Fourze, a part that significantly raised his public profile. He has also been a prominent figure in stage play adaptations of popular anime, most notably portraying Asahi Azumane in the Hyper Projection Play Haikyu series.

In the realm of anime voice acting, Tomimori has taken on a limited number of roles. He is widely known for voicing the Bulgarian exchange student Daniel Stefanov in the 2018 sports anime Hinomaru Sumo, a role confirmed by multiple sources. He also provided the voice for Iori Kanazawa in the 2020 anime Haikyu!! To The Top, extending his involvement with the Haikyu!! franchise beyond the stage adaptations. His filmography does not indicate any frequent, recurring collaborations with specific directors or animation studios. While he has achieved popularity and recognition for his performances, particularly in Kamen Rider Fourze and the Haikyu!! stage plays, publicly documented information does not list any major awards for his voice acting work.