Kosaka drops to death while ice climbing with his friend Uozu to see the sunrise on the New Year’s Day. The investigators try to find the cause of the death, then discover that the cut rope was made in the factory for which Uozu’s brother works.
| Actor | Role |
|---|---|
 Kenji SugawaraNot listed | Not listed |
 Fujiko YamamotoNot listed | Not listed |
 Hitomi NozoeNot listed | Not listed |
 Keizō KawasakiNot listed | Not listed |
 Kyū SazankaNot listed | Not listed |
 Ken UeharaNot listed | Not listed |
 Atsuko KindaichiNot listed | Not listed |
 Kumeko UrabeNot listed | Not listed |
| KKōichi ItōNot listed | Not listed |
 Kanji KawaraNot listed | Not listed |
 Kenji OyamaNot listed | Not listed |
 Koh SugitaNot listed | Not listed |
 Sho NatsukiNot listed | Not listed |
 Manabu MoritaNot listed | Not listed |
| MMitsuko Han'yaNot listed | Not listed |
 Sachiko MeguroNot listed | Not listed |
 Eiichi TakamuraNot listed | Not listed |
| TTsutomu NakataNot listed | Not listed |
 Kikuko TachibanaNot listed | Not listed |
| NNaoyasu ItōNot listed | Not listed |
| MMitsuhiko KurosuNot listed | Not listed |
 Kōji FujiyamaNot listed | Not listed |
| KKisao TobitaNot listed | Not listed |
 Ken YamaguchiNot listed | Not listed |
| MMunehiko TakadaNot listed | Not listed |
| KKeiko OdagiriNot listed | Not listed |
 Gen HaradaNot listed | Not listed |
 Jiro TamiyaNot listed | Not listed |
| KKen WakamatsuNot listed | Not listed |