Shouzou Toki's Private Detective Trouble Notes: Hard and Loose(私立探偵・土岐正造トラブル・ノート ハード&ルーズ)

Based on the manga by Tsuchiya Garon (aka Marley Carib) and Kawaguchi Kaiji, serialized in Action in the 80s. A detective thriller in which former boxer Shozo is thrown into a web of intrigue when he picks up a ringing phone in a room whose occupant he is supposed to be following.