Jin Domon is a Japanese voice actor born on June 22, 1972, in Yamagata Prefecture, Japan. He is a graduate of the Aoni Juku Tokyo school, a notable training institution for voice acting talent. His career began in the 1990s, with some of his earliest roles including minor characters in the anime series GS Mikami and Slam Dunk. Over the years, he has been affiliated with several talent agencies, including Aoni Production, Office Mori, and Media Force, and is currently represented by Lil Porta.

Domon has built a career characterized by a wide range of voice roles across anime, video games, and drama CDs. He is perhaps best known for his long-running role as Lucky Roux in the immensely popular series One Piece, a character he has voiced since 1999 in both the television series and related films such as One Piece Film Red. Another significant and recurring role is in Nintama Rantaro, where he serves as the second voice actor for the characters Hisakusaku Nose and Tomokichi.

His extensive filmography includes appearances in major franchises. He has lent his voice to characters in Crayon Shin-chan, Detective Conan, Future Diary, Bleach, and the Kero Kero Keroppi series. In Future Diary, he voiced the character Volcano Koufuku. His work also extends to the video game world, with notable performances in the Ryu ga Gotoku (Yakuza) franchise and the Green Green game series.

In the specific roles mentioned in the query, Jin Domon is confirmed as the voice of Hedoki. He played this role in the 2018 original video animation Yu Yu Hakusho: Two Shots / All or Nothing, a two-part project that adapts side stories from the original manga. He is also the voice of Hikaru Ichibanboshi, a member of the comedic "Baka Trio" in the romantic comedy anime Green Green. Domon voiced this character in the 2004 original video animation Green Green: Erolutions, which serves as a thirteenth episode sequel to the television series.

Throughout his career, Domon has collaborated with a wide array of fellow voice actors. Publicly available records, such as those on fan databases, indicate frequent collaborations with actors like Chafurin, Takehito Koyasu, and Nobuyuki Hiyama, among many others. His talent is not limited to acting; he is also an instructor at the Japan Association of Voice Actor Proficiency Testing, contributing to the development of new talent in the industry. His work continues, with a recent role as Hotaka in the 2025 anime series CITY THE ANIMATION.