The Omi Alliance was a Kansai-based yakuza clan which was founded during the first two decades of the 20th century. Anchored in Osaka, the Omi was the largest yakuza syndicate in Japan for much of its history, with 120 families and 35,000 members by 2006. The Omi frequently warred with the second-largest yakuza clan, the Tojo-kai of Kansai, until the 2010s saw the passage of anti-yakuza legislation that led both the Omi and Tojo chairmen to agree to a joint dissolution of their clans in 2019.
History[]
Founded in the early 20th century, the Omi established Osaka as their main base of operations and came to dominate the surrounding region; by 2006, the clan was the largest of its type in Japan, with 120 families and 35,000 members. In December 1988, the Omi was involved in a dispute with the Tojo-kai over an empty lot in Tokyo, with the Shimano-gumi subsidiary of the Tojo offering to sell the lot to the Omi and grant them an opportunity for expansion into Tokyo. However, the Omi's plot to acquire the lot was thwarted by their hostage Goro Majima and the ex-Tojo yakuza Kazuma Kiryu, and Futoshi Shimano was forced to murder the Omi chief of headquarters to distance himself from the Omi and cover up his treachery. The Kansai-Kanto rivalry continued into 2005, when Goryu-kai leader Ryuji Goda attempted to wade into the 2005 Tojo-kai civil war by allying with the MIA intelligence agency to steal the Tojo Clan's 10 billion yen, again thwarted by Kiryu.
In 2006, Ryuji Goda seized control of the Omi from his father, Jin Goda, and attempted to take advantage of the Tojo's weakness by mounting an offensive against the clan, wiping out several of its officers and nearly destroying the clan with the help of the Jingweon Mafia; however, Kiryu helped Daigo Dojima rise to the Tojo chairmanship and fight off the Omi invasion of Kabukicho as he defeated Goda, who was betrayed and killed by Ryo Takashima, himself fatally wounded by Ryuji. The next several years saw the Omi retreat from their conflict with the Tojo, and chairman Tsubasa Kurosawa established friendly relations with Dojima after the Tojo's civil war of 2009. In 2012, Kurosawa's cancer diagnosis caused him to maneuver to empower his son Masato Aizawa to take over on his death, and he used his alter ego as a policeman to deceive the Omi lieutenants and Tojo leaders into feuding with each other as he attempted to wipe them all out. Eventually, Kiryu, Taiga Saejima, Shun Akiyama, and Tatsuo Shinada joined forces to unravel Kurosawa's conspiracy, and the Tojo and the Omi lieutenants were able to defeat and overthrow Kurosawa and make Masaru Watase acting chairman.
By the late 2010s, the passage of anti-yakuza legislation severely weakened the Tojo and Omi, and ex-Omi yakuza Ryo Aoki, who was elected Governor of Tokyo, enacted the Kabukicho 3K Plan to crack down on the Tojo and allow for the Omi to move into Tokyo and become his political pawns. In secret, Watase and Daigo Dojima conspired to go along with the plan, allow for the Omi to become overextended, and then announce the joint dissolution of their clans when Watase, in prison from 2017 to 2019, was released. With the help of the Daidoji Faction, Kiryu, and Ichiban Kasuga's party, the chairmen were able to oversee the joint dissolution at Omi HQ and defeat Kosei Shishido and Homare Nishitani III's attempted coup. The Omi proceeded to send a statement to the police apologizing to the public for terrorizing them for a century and announcing their and the Tojo's formal and final dissolution.