Masako Katsuki (勝生 真沙子, Katsuki Masako; born Shiono (塩野)) is a Japanese actress, voice actress and narrator formerly affiliated with Theater Echo and now with 81 Produce. Following her debut in Shiroi Kiba: White Fang Monotagari as the role of Mary Scott, Katsuki has lent her voice to several notable anime, Japanese-dubbed films and TV series, games, drama CDs, narration, and commercials. Some of her best-known roles include: Maria Von Trapp in Trapp Family Story, Reccoa Londe in Zeta Gundam, Maya Kitajima in Glass Mask, Masuyo Ikari in High School! Kimengumi, Michiru Kaioh/Sailor Neptune in Sailor Moon and Tsunade in Naruto.