expression, noun
voice acting; appearing as a voice actor
Used in credits for films, TV shows, games, etc. to indicate that a person performed as a voice actor. Often seen in the form 「声の出演:名前」.
See also: 出演
このアニメ映画では、有名俳優が声の出演をしている。
In this animated film, a famous actor makes a voice appearance.
エンドロールに「声の出演」として彼の名前があった。
His name was in the end credits under 'voice cast'.