
Quick answer — Keiko Takeshita voices Jirou no Haha in The Wind Rises, Izumi in The Boy and the Heron, Sadako in The Secret World of Arrietty and 1 more characters.
Keiko Takeshita voices Jirou no Haha (The Wind Rises), Izumi (The Boy and the Heron), Sadako (The Secret World of Arrietty), Hana Matsuzaki (From Up on Poppy Hill).
Jirou no Haha is voiced in Japanese by Keiko Takeshita.