Also known as The Blind Swordsman's Revenge, this is Zatoichi Versus The Flying Guillotine (1972). Zatoichi is "born Wu Ching Hui, he was kidnapped by pirates as a youth and taken to Japan, where he learned his cane sword skills. He appears to be widely known in China by his Japanese name, but as the film opens he is just returning to China to look up his long-lost brother, Tieh Hou. To his dismay, he learns that the brother has been killed in a sword duel with one Chu Yen Jieh. The grief-stricken prodigal blubbers in mourning and vows revenge."
A great Kung Fu expert is murdered by a gang of thugs who are accompanied by a Japanese warlord. The Kung Fu experts young son is also attacked by the thugs and turned into a mute. 10 years later, the boy, now a young man, goes after the men who slaughtered his family.
