Legend of the Assassin 1984 on netflix

The Saika clan, that had succeeded in battle against the large armies of Nobunaga and Hideyoshi, had in the Tokugawa era of Ieyasu, been driven into the mountains 7 generations later, forced into subsistence hunting. A man comes to them offering revenge: to assassinate current Tokugawa Shogun Yoshimune. (Made-for-TV movie)