Taitei no Ken
Synopsis. Orichalcum is a rare and powerful material from a meteorite that was forged into three priceless artifacts. Those that can unite the three items are said to attain great power within the universe. Two conflicting alien forces fight and crash land in ancient Japan to get Orichalcum. Yorozu Genkurou, a samurai who managed to acquire the sword called "Taitei no Ken (The Sword of Alexander)" soon realizes its true potential as he battles ninjas and aliens that covet his life and sword.