Shadow Skill (1996)
English title: Shadow Skill: The Movie
Japanese title: 影技 SHADOW SKILL
Type: OVA
Episodes: 3
Source: Manga
Genres: Action, Adventure, Drama, Fantasy
Studios: Zero-G Room
Producers: Takeshobo
Duration: 30 min per ep
Rating: R - 17+ (violence & profanity)

In a war torn world of deadly conflict, one small group of heroes stands against the forces of darkness, armed only with two weapons—their unswerving dedication to good and the superhuman martial art known as the Shadow Skill...

(Source: ANN)