Hiroshi Shimozaki is a Japanese voice actor born on September 25, 1977, in Toyama Prefecture, Japan. He began his career in voice acting in 1999, with one of his earliest roles being in the anime Rurouni Kenshin: Trust & Betrayal. Since then, he has built a extensive career, contributing his voice to a wide variety of anime series, films, and video games over several decades.

Shimozaki is perhaps best known for his long-running role as the Ox-Faced Middle Class Yōkai in the beloved Natsume Yujin-cho (Natsume's Book of Friends) series. He first voiced the character in 2008 and continued in the role across multiple television seasons, including Natsume Yujin-cho Go and Roku, as well as in several animated films such as Natsume Yujin-cho the Movie: Ephemeral Bond and Natsume Yujin-cho: Ishi Okoshi to Ayashiki Raihousha. This role is a prime example of his frequent work in the fantasy genre, often portraying妖怪 (yōkai) or other supernatural beings.

Another of his notable recurring roles is as the personification of Denmark in the popular comedy anime Hetalia, appearing in multiple seasons including Hetalia The World Twinkle. His work also extends to video game adaptations; he provided the Japanese voice for the character VAVA (Vile) in the 2006 OVA MegaMan Maverick Hunter X: The Day of Sigma, which accompanied the game of the same name.

Throughout his career, Shimozaki has taken on a wide range of supporting and guest roles in numerous other series. Examples include Sasagoi the Striated Heron in the short-form anime Dibetagurashi: Ahiru no Seikatsu, Kobayashi in the film The Asylum Session, and Mr. Fly in After School Midnighters. He has also been a consistent presence in long-running franchises, providing voices for various characters in The Prince of Tennis, Yu-Gi-Oh! GX, and the works of director Makoto Shinkai, such as 5 Centimeters Per Second and The Garden of Words. His career demonstrates a pattern of versatile character work, often in ensemble casts, and a long-standing association with series like Natsume Yujin-cho and Hetalia.