Karasu Tengu Kabuto: Ougon no Me no Kemono
Genres: Action, Adventure, Drama
Type: OVA, Episodes: 1
Aired: Jul 24, 1992
Source: Unknown
Rating: R+ - Mild Nudity
Synopsis:
Kabuto is a tengu who has to save a princess from fortress which is full of monster-mecha hybrids in an alternate reality of feudal Japan. 

(Source: ANN)