Soma Santoki is a Japanese actor who began his career in the entertainment industry at a young age. He was born in Tokyo, Japan, on June 6, 2005, and has been active as an actor since 2010. His entry into show business occurred when he was five years old, after he and his two older sisters were scouted.

While Santoki has worked extensively as a live-action actor in Japanese television dramas and films, his most prominent role as a voice actor in animation is the lead role in the acclaimed 2023 Studio Ghibli film The Boy and the Heron. In this film, he provided the Japanese voice for the protagonist, Mahito Maki, a young boy who embarks on a fantastical journey after moving to his mother's rural estate. This role represents his most significant achievement in the field of anime voice acting.

Beyond his voice work, Santoki has built a diverse acting portfolio. His live-action credits include roles in the Netflix series The Days, the television series The Greatest Teacher (Saikou no Kyoshi), Under Ninja, and the film Cube. He has also appeared in the NHK taiga drama Idaten and the asadora Yell.

The majority of Santoki's known professional collaborations are in live-action productions rather than voice acting. His credits in film and television include work with a range of Japanese directors and actors, but there is no publicly documented pattern of recurring collaborations or regular associations with specific animation studios or directors outside of his work with Hayao Miyazaki on The Boy and the Heron. He continues to work as an actor in both live-action and voice roles, with upcoming projects including the film 90 Meters.