Synopsis: Iron Knight Musashi

Musashi the Iron Fighter / Tetsu Senshi Musashi / 鉄戦士ムサシ A beautiful princess escaped the rebel army on her home planet and fell to Earth, where she met the Japanese boy Hanamoto Musashi, who will bravely fight to protect her in a mecha-samurai armor suit. The climactic battle is a sci-fi retelling of the famous duel of Ganryujima. (Source: Mangapedia, translated, edited)