Hiroshi Okamoto is a seiyuu born on August 27, 1977, currently managed by Aoni Production.
Not related to Nobuhiko Okamoto.
- Andy Bogard in The King of Fighters XIV (replacing Keiichi Nanba)
- Dodomeki in Warriors Orochi
- Ing Egret in 2nd Super Robot Wars: Original Generation
- Tsurein Zan Lecarnivan in Masou Kishin II: Revelation of the Evil God
- Johan/Oswald the Iron in Valkyria Chronicles (game and anime)
- Kouji Tanbabashi in Inari, Konkon, Koi Iroha
- Motoki Furuhata in Sailor Moon Crystal
- Nozomi "Buchi" Kobuchizawa in the Princess Resurrection OVA
- Rabian in One Piece
- Seborga in Hetalia: Axis Powers
- Takakage Kobayakawa and Katsuyori Takeda in Samurai Warriors 4
- Ultraman Dyna in Ultraman Boy no Urukoro
- Taiga Shinsekai in Hero Bank 2
- Yoshiki in Binary Domain