Umon’s services are called upon when innocent bystanders, Kayo and Minokichi, along with the ronin, Gontaro are mistakenly identified as suspects in several recent murder cases. To prove their innocence and uncover the truth, Umon launches his own investigation.
| Actor | Role |
|---|---|
 Ryutaro OtomoNot listed | Not listed |
 Kōtarō SatomiNot listed | Not listed |
 Satomi OkaNot listed | Not listed |
 Kyoko AoyamaNot listed | Not listed |
 Chizuru KitagawaNot listed | Not listed |
 Keiko OkawaNot listed | Not listed |
 Emi ItoNot listed | Not listed |
 Yumi ItoNot listed | Not listed |
 Shunji SakaiNot listed | Not listed |
 Haruo TanakaNot listed | Not listed |
 Zeko NakamuraNot listed | Not listed |
 Sonosuke SawamuraNot listed | Not listed |
 Jotaro TogamiNot listed | Not listed |
 Kusuo AbeNot listed | Not listed |
 Eitarō ShindōNot listed | Not listed |
 Isao YamagataNot listed | Not listed |
 Ryūnosuke TsukigataNot listed | Not listed |
| TTokinosuke NakamuraNot listed | Not listed |
| HHiroshi MizunoNot listed | Not listed |
| MMichisaburō SegawaNot listed | Not listed |
| RReiji TsumuraNot listed | Not listed |
 Kodayu IchikawaNot listed | Not listed |
| IIkkō ŌkuniNot listed | Not listed |
| KKazutarō KuniNot listed | Not listed |
| IIkutaro IbukiNot listed | Not listed |
| SShintarō KuraokaNot listed | Not listed |
| KKokichi NakamuraNot listed | Not listed |