The Uenoseiwa-kai was a Tokyo-based Japanese yakuza organization. During the 1980s, the Uenoseiwa-kai were the primary rivals of the Tojo-kai, competing for control over the Tokyo underworld after the destruction of the Korean Jingweon Mafia. In April 1985, a Tojo-kai assassination attempt on Yoshiharu Ueno at a Kabukicho ramen shop left 18 of 20 Uenoseiwa-kai members dead, but Yoshiharu and another man, Isao Katsuragi, survived. Before the Uenoseiwa-kai could retaliate, Dojima-gumi lieutenant Kazuo Shibata brokered a truce, with the two alliances agreeing to work together in their respective territories, and the Sasai-gumi being expelled from the Tojo-kai; Shibata and Katsuragi had secretly engineered the hit attempt to bolster their own career advancements. By 2010, Katsuragi had succeeded Ueno as the Uenoseiwa-kai's chairman, but he was effectively the puppet of police commissioner Seishiro Munakata. Katsuragi was killed after attempting to double-cross the Tojo-kai chairman Kazuma Kiryu in the Kabukicho Hills, and the eventual exposure of the Uenoseiwa-kai's conspiracy with the police commissioner led to the clan disbanding and its territory being absorbed by the Tojo-kai.