Kōichi Sakaguchi (坂口 候一, Sakaguchi Kōichi, born February 10, 1968) is a Japanese voice actor affiliated with 81 Produce. He also had a recurring role in both the Japanese and English language Pokémon anime which saw him voicing Jessie's Arbok up until Episode 6 of the Hoenn series which saw Arbok and its companion, Weezing being released to help protect a herd of Koffing and Ekans who had been captured by a hunter. He is also known for being the voice actor of Prince Hata from the anime Gintama.