Unification of Japan Gaiden: Yamazaki Ichimon 4

The film centers on a series of mysterious resident disappearances at a Kyowakai-owned apartment in Kabukicho. Nakajima, portrayed by Yoshimi Tachi, takes on the investigation despite the risks, while Tamura, played by Yoshiyuki Yamaguchi, expresses concern for his safety and assigns Saito, acted by Katsuya, to accompany him.

As the duo navigates the complex environment of Kabukicho, they struggle to uncover any leads. Saito's recollection of past rumors about the "Kabukicho kidnappings" adds layers to the story, especially as he reaches out to a former inmate for insights. The plot thickens when Nakashima, driven by personal motives, ventures into Kabukicho alone. His exploration leads to an unexpected phone call that may change everything.