Nakajima (Yoshimi Tachi) returns to the office for the first time since the end of the self-isolation period. He urges everyone to sanitize and keep social distance, but the other members act like nothing’s changed. Unable to hide his frustration, Nakajima is further thrown off by Himuro (Yasukaze Motomiya), who also seems completely unfazed. In the midst of this, a letter arrives for Himuro—from Hayato Omiya, currently serving time in prison.

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?

In the afternoon, Himuro (Yasukaze Motomiya) and the others enjoy coffee brewed by Tora (Miyabi Koteyama). While discussing the taste of coffee with Tamura (Yoshiyuki Yamaguchi) and Hasegawa (Daisuke Ohyama), Joji (Takashi Kitadai) starts reminiscing about the time he joined the gang.

Yamamura (Kenta Kawasaki) is enthusiastically explaining his favorite anime to Tamura (Yoshiyuki Yamaguchi), while Himuro (Yasukaze Motomiya) reads a novel—creating a warm and peaceful mood in the office. Just then, Ishizawa (Hiroto Honda) arrives, carrying Himuro’s guns. Himuro takes out two pistols to clean. One is a magnum gifted by Tamura. And the other… is the very gun tied to a fateful incident between him and Tamura.

A complete digest of “Unification of Japan” from “Unification of Japan 1” to “Unification of Japan 10”!

Himuro (Yasukaze Motomiya) and Tamura (Yoshiyuki Yamaguchi) returned to Tokyo to confront Okada (Yuki Matsumura). However, waiting for them was a notice of succession from the Hasekai, which was supposed to be under the Kyowakai's control. Upon learning that Okada’s faction had ties to the Hasekai's new successor, Himuro immediately severed ties, bringing the direct showdown between the Kyowakai and Marugami-kai closer. Meanwhile, Reiko (Reira Arai), who had been hiding with Genji (Kuroishi Takahiro), continued living in hiding, harboring distrust towards Genji and others. Despite this, she remained focused on her vengeance against the Kyowakai. While Himuro and the others tried to clear up Reiko's misunderstanding for Minami (Rin Asuka), Reiko refused to listen. Gradually, she became more involved with Okada’s faction, who were willing to use anything for the war against the Kyowakai.

Having been appointed Second Generation Yamasaki-gumi Wakagashira, Himuro (Yasukaze Motomiya) expanded his influence across Gifu and Shiga, making his name known even in political and business circles.However, this led to lingering tensions with the Hiroshima-based gangster group Genseikai.Under the orders of Kyokai Kaichō Kudo (Hakuryu), Himuro and Tamura (Yoshiyuki Yamaguchi) intervened in the succession dispute of Nagoya’s largest organization, the Shigemitsu-ikka.The conflict with Genseikai brought Himuro significant losses.Although the situation was calmed with the help of Akimoto (Sho Aikawa) and others, the power balance in Kansai was profoundly shaken.

The Osaka war ended in a complete victory for the Kyowakai, finally bringing the city under their control. Yamazaki-gumi’s head, Kawatani (Hitoshi Ozawa), with Himuro (Yasukaze Motomiya) and Tamura (Yoshiyuki Yamaguchi) at his side, was recognized for his achievements and appointed as the Kyowakai’s main family Wakagashira. As Yamazaki-gumi steadily gained power, Himuro worked to expand the organization further, focusing on internal reform and establishing legitimate business operations. Meanwhile, a minor clash between Tamura’s young members and the Yanagase Rengokai sparked a new conflict, spreading across all of Gifu—another war erupting in the wake of the Osaka battle!

Himuro (Yasukaze Motomiya) and Tamura (Yoshiyuki Yamaguchi) both plan their advance into Osaka, each seeking to honor their respective bosses. Meanwhile, the Yamatokai in Osaka’s Minami, who had been harboring the remnants of the Shintokai, attempts to eliminate them to avoid conflict with the Kyowakai. However, their plan fails, giving the Kyowakai a reason to declare war. Seizing the opportunity, Kyowakai’s second-generation boss Kudo (Hakuryu) launches a full-scale assault on Osaka. Thus begins the brutal Osaka war, fought for the position of the Kyowakai’s next Wakagashira!

After running amok, Omiya of the Mikami-gumi-affiliated Omiya-gumi is killed. Himuro (Yasukaze Motomiya) is framed for the crime. Tamura (Yoshiyuki Yamaguchi), who admired Omiya, rebels against Himuro and declares himself the new Omiya-gumi boss. Worried about Himuro facing Tamura’s rampage, Mikami-gumi head Mikami (Eiichi Furui) entrusts him to Kawatani (Hitoshi Ozawa), the head of the Kyowakai Yamasaki-gumi and Himuro’s sworn brother. Meanwhile, Tamura heads to Osaka to elevate Mikami to the position of Kyowakai Wakagashira. Thus, the clash between Himuro and Tamura draws near.