Unification of Japan Gaiden: Yamazaki Ichimon (2020)

At the same time as Kikumura's disappearance, the Ryuseikai group office was being moved. Himuro (Yasufu Motomiya), who has been strictly told by the landlord of the new group office to use the office quietly, advises the members including Tamura (Yoshiyuki Yamaguchi), but Kawakami (Tatsuya Nakazawa) and Nakajima (Masami Tate) ) and the others ignore his advice and go on a rampage, incurring Himuro's anger.