Unification of Japan Episode Collection V: Remote MeetingMovie

Himuro (Yasukaze Motomiya) was holding a remote meeting via computer to hear updates from members of the Yamazaki family. While Kawakami (Tatsuya Nakazawa) was cleaning the Yokohama office, he found a childhood photo of Himuro. Tamura (Yoshiyuki Yamaguchi) encourages the members to talk about Himuro's relationship with the Fujishiro-gumi. What past of Himuro's will be revealed during this conversation?