Kaiketsu Lionmaru

During the Warring States period, the demon king Gosun, who has been hiding in the Himalayas for a hundred years and has mastered evil sorcery, is aiming to conquer Japan. Shishimaru fights as the invincible ninja Kaikitsu Lionmaru with the sword given to him by Koji Kashin, Japan's greatest ninja!

(Source: Kadokawa, translated)