Ninja In The Deadly Trap (1981)

Set against the backdrop of the Ming Dynasty, chaos erupts along the Chinese coast as Japanese pirates devastate towns. Amidst this turmoil, a group of ninjas emerges, setting their sights on General Chi, the Chinese military commander. To counter this formidable threat, the Master of the Three Arts, armed with a book detailing ninja techniques, vows to enlist his students into Chi's army. Together, they embark on a mission to eradicate the deadly assassins and restore peace to the beleaguered region.