Kenichi Ishii is a Japanese actor and voice performer born on February 24, 1946. His career in screen acting and voice work spans from the late twentieth century into the early twenty-first century.

Ishii is known for his role in the 2001 historical fantasy film Onmyoji, directed by Yojiro Takita. In this production, which is a live-action film rather than an anime series, he portrayed the character Fujiwara no Kaneie. The film, based on the novels by Baku Yumemakura, is set in the Heian period and follows the exploits of the legendary onmyoji Abe no Seimei. Ishii's performance as Fujiwara no Kaneie appears in the cast listings for this film, which is the most prominent credit associated with his name in the search results.

Beyond his work in Onmyoji, Ishii has also contributed to Japanese television and film voice acting. His filmography includes a role in the 1993 film Gosei Sentai Dairanger: The Movie, part of the long-running Super Sentai franchise, where he voiced the Duke of Cards. He also appeared in the 2006 television series Ultraman Mebius as Aide Toriyama, which, while primarily a live-action tokusatsu production, features voice and character performance elements. In 2007, he had a role in the series Juken Sentai Gekiranger as Kira Yoshinaka.

The search results confirm Kenichi Ishii's involvement in the 2001 Onmyoji film, but do not provide sufficient information to elaborate on any other major voice roles, specific recurring collaborations with directors or production companies, or notable achievements such as awards dedicated to his voice acting career.