Kouda-san is a voice artist much in demand for both her singing and her voice artist work and has had a number of radio shows in Japan since 1995. You can learn more by visiting Hitoshi Doi's page (which is now a bit dated) or Ryuu's Seiyuu Info (which includes some of her more recent work). There is a Japanese site which lists public and promotional events at which she has appeared. You can find a brief biographical sketch and a voice sample for her at Aoni Productions. You can also visit her official site (among other things, home of her recent Internet radio show), GM.