Ikue Ōtani has provided Pikachu's Japanese voice in the Pokémon anime since its 1997 debut.
Ōtani is a Japanese voice actress known for roles in anime, video games, and animated films. Her performance gives Pikachu its distinctive spoken name, cries, and emotional sounds, even though Pikachu rarely speaks in ordinary human language.
Unlike many anime roles, Pikachu's voice has remained closely associated with one performer across the franchise's long history. Ōtani has also voiced Pikachu in Pokémon films, promotional productions, and numerous games. This consistency helped make Pikachu's sound recognizable across languages and generations.
The English-language dub uses a separate voice performance, so the Japanese and English casts are sometimes confused. Rica Matsumoto voices Ash in Japanese, while Ōtani voices Pikachu. The character's vocal identity is therefore distinct from Ash's, even when the two appear together in nearly every episode.