It has been reported that Yuko Mizutani passed away on May 17th. She was previously diagnosed with breast cancer and has apparently lost that battle.
Mizutani may be best known for lending her voice to Sarah Zabiarov in Mobile Suit Zeta Gundam back in 1985, as well as being the original voice behind Sora Takenouchi in Digimon Adventure. She most recently voiced Ikuko Tsukino in Pretty Guardian Sailor Moon Crystal. Mizutani's also lent her voice to video games including being the Japanese voice of Minnie Mouse in the Kingdom Hearts series.
Mizutani was 51 years old.