Kare to kanojo to mei tantei (1950)

When Mr. Kurano, a shady Osaka tycoon, had his mistress Yuriko Haruyama run off on him, he hired the bumbling detective Hanawa to track her down. Hanawa deduced she was staying in Tokyo and, using the birthmark on her breast as a clue, headed to Tokyo. He zeroed in on the “Chaotic Hotel” and stormed right in. The hotel’s guests include a motley crew of chaotic characters.