From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Eiko Yamada (栄子 山田, Yamada Eiko) (born on June 13, 1954 in Yokohama, Kanagawa Prefecture, Japam), later known as Eiko Hisamura (久村 栄子, Hisamura Eiko), is a Japanese voice actress and theatre actress.
She has done much voice over work in Japan, such as anime and video games. She is currently a free agent not employed by any talent management firm, though she was formerly employed by Aoni Production.
She voiced Mai in the Japanese dub of Dragon Ball and Dragon Ball GT. She has also voiced many other characters in the World Masterpiece Theater anime series from Nippon Animation, including Anne from Anne of Green Gables and Jo from Ai no Wakakusa Monogatari.
She worked under her maiden name for a long time after her marriage, and so that name is still often used.