About Yūko Mizutani
Yūko Mizutani (水谷 優子, Mizutani Yūko; November 4, 1964 – May 17, 2016) was a Japanese actress, voice actress, narrator and singer from Ama District, Aichi. Throughout her career, she worked with Production Baobab, and was working with Aoni Production at the time of her death. Mizutani was best known for her anime voice roles of Sakiko Sakura in Chibi Maruko-chan, Mihoshi Kuramitsu in Tenchi Muyo! and Pinoko in Black Jack. She also portrayed Excellen Browning in Super Robot Wars, Sora Takenouchi in Digimon Adventure, Leina Stol in Machine Robo: Revenge of Cronos, and Sarah Zabiarov and Cheimin Noa in Mobile Suit Zeta Gundam. Mizutani was the official Japanese voice actress for Minnie Mouse, and voiced her in the Kingdom Hearts franchise. Since her death, Aya Endō took over as the Japanese voice of Minnie Mouse and Machiko Toyoshima took over as Sakiko Sakura in Chibi Maruko-chan.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.