Soujuu Senshi Psychic Wars

捜獣戦士サイキック・ウォーズ

Ukyo Rettsu, a surgeon, treats a mysterous old woman for a mysterious "cancer." The growth turns out to be a messenger from the ancient past of Japan heralding a demonic invasion of the Earth. Ukyo must go back in time and fight the race of ancient demons.

(Source: AniDB)