Sutematsu and Sukekichi, residents of Benten Nagaya tenement, witness a woman being thrown from a palanquin into a river and are immediately attacked by several samurai. They are saved by a fellow tenant, the ronin Ginzaburo Fujizaki. One of the assailants drops a wooden tag bearing the Onitsuta-bishi (demon ivy diamond) crest. The next morning, the woman’s body is found on the lumber dock. She is Omino, daughter of Omiya, a money exchanger in Nihonbashi.
| Actor | Role |
|---|---|
 Jūshirō KonoeFujizaki Ginzaburo | Fujizaki Ginzaburo |
| KKichiya BandoChoji | Choji |
 Hiromi HanazonoOrin | Orin |
 A-suke AkitaSutematsu | Sutematsu |
 B-suke AkitaSukekichi | Sukekichi |
 Kensaku HaraSakakibara Mondo-no-kami | Sakakibara Mondo-no-kami |
 Ryōsuke KagawaNiiyama Gendayu | Niiyama Gendayu |
 Toshiko FujitaShizu | Shizu |
 Kenjiro UemuraOnimoto Kannokuro | Onimoto Kannokuro |
 Ryūzaburō NakamuraTodo Takatada | Todo Takatada |
| KKinichi HanabusaKanta | Kanta |
| KKazuo TokitaMasakichi | Masakichi |
| KKinnosuke FujikiHayakawa Minamoto-no-jo | Hayakawa Minamoto-no-jo |
 Tetsunosuke TsukigataAmemori Kakunoshin | Amemori Kakunoshin |
 Jotaro TogamiHagata Genpaku-sai | Hagata Genpaku-sai |
 Eijirō KataokaIhara Shohachi | Ihara Shohachi |
| MMitsukazu KawamuraYamazoe Hachirobei | Yamazoe Hachirobei |
| SShinji OdaMunakata Chikara | Munakata Chikara |
| KKunio HikitaIsotsuka Hyogo | Isotsuka Hyogo |
| TTamao MurataKyozuka | Kyozuka |
| KKōtarō NireiGizan | Gizan |
| IIkuo OkaRyonen | Ryonen |
 Yumiko MiharaOsachi | Osachi |
| IIkkō ŌkuniNagasakiya Jubei | Nagasakiya Jubei |