Hikaru Midorikawa Fan Club
- Yahoo! Club devoted to the Seiyuu.
- http://groups.yahoo.com/group/hikarumidorikawafanclub/

Midorikawa Hikaru WebRing
- A webring for fans of Japanese anime and game seiyuu Midorikawa Hikaru, and his characters.
- http://e.webring.com/hub?ring=midorikawahikaru

Hikaru's Bar
- Created and maintained by Midorikawa Hikaru. News, a BBS, a favorite character poll, and voice samples. [English/Japanese]
- http://www2.g-7.ne.jp/~hikaru/

Hitoshi Doi's Seiyuu Database
- Provides information on voice roles, CDs, books, radio and events.
- http://www.tcp.com/doi/seiyuu/midorikawa-hikaru/

The Midorikawa Hikaru Yahoo Group
- The Emotional Intricacy of Characters. Homepage for the mailing list. Focuses on character discussions, information, pictures, sound files, links, and polls for members.
- http://cyberpsychos.netonecom.net/hikaru

Perry and Ansatsusha's Seiyuu Page
- List of anime series, with character images.
- http://www.perryandtsua.com/Seiyuu/Midorikawa_Hikaru.html