The Man Disappears Yesterday (1964)

Tired of everyday life, the 8th Shogun Yoshimune flees Edo Castle and asks Ooka Echizen to become his personal assistant. In a rice shop, Yoshimune meets a simple ronin Ohashi Kenshiro, and receives permission to stay at his house, but a mysterious corpse awaits him in the house... And then the second, third and fourth murders occur...