Masako Katsuki (勝生 真沙子, Katsuki Masako?), née Masako Shiono (塩野 雅子 Shiono Masako, born October 15, 1958) is a veteran seiyū who was born in Hachinohe, Aomori. She is currently employed by 81 Produce and has voiced in several notable films and tv series. Katsuki is best known for the roles of Maria Von Trapp (Trapp Ikka Monogatari), Reccoa Londe (Zeta Gundam), Maya Kitajima (Glass Mask), Masuyo Ikari (High School! Kimengumi), Michiru Kaioh/Sailor Neptune (Sailor Moon series), and Tsunade (Naruto)

Source: Wikipedia