The 1994 Kokusui-kai–Yamaguchi-gumi Conflict turned an altercation at a Tokyo office into a gang war that spread across multiple prefectures. In Jake Adelstein’s retrospective account, Sekiguchi places the outbreak in the larger contest over the Yamaguchi-gumi’s expansion into Tokyo: the immediate dispute mattered, but so did the question of which organization could claim the territory around it.

Background and Outbreak

On November 16, 1994, hostilities boiled over between the Kokusui-kai and the Yamaguchi-gumi. Two Yamaguchi-gumi members had visited a Kokusui-kai office in Taito Ward, Tokyo, after a car accident involving a member of the Kokusui-kai. The visit was meant to settle the matter. According to Sekiguchi’s account, an argument followed, and a Kokusui-kai member drew a gun and shot the two visitors, wounding them.

The incident was not simply a quarrel over an accident. Sekiguchi understood it against the Yamaguchi-gumi’s long effort to establish itself in Tokyo. The organization dominated Kansai and controlled about 40 percent of that region’s market; its movement eastward brought it into conflict with groups that regarded Tokyo as their own ground. The Kokusui-kai, in Sekiguchi’s assessment, resented the presence of Kansai members on its turf. In Saitama, the Yamaguchi-gumi did not yet have an office, and the shooting carried a broader warning about its advance.

Retaliation and Geographic Spread

The Kokusui-kai struck first at the Tokyo office. The following day, the Yamaguchi-gumi retaliated, and the conflict widened beyond the original dispute. Hostilities spread through Saga and Yamanashi, then reached Shinjuku in Tokyo and finally Saitama Prefecture. The sequence made the conflict’s escalation plain: violence at one office had become a struggle played out across several regions.

The tension entered the police beat as immediate news. Adelstein was at the police press club, learning mahjong from a senior reporter, when a public-affairs officer rushed in with word of a shooting. Adelstein caught a ride to the scene in Konosu. The Kokusui-kai office was in a seven-story condominium building, behind a sign identifying the premises as an Eastern and European private-investigation agency. The conflict was thus encountered not only as a gang confrontation but through the ordinary routines of police reporting: a warning at the press club, a ride to the site, and an office whose public appearance concealed its organizational use.

Territory, Organization, and Cover

At the time, the Kokusui-kai was the third-largest crime group in Saitama, after the Sumiyoshi-kai and the Inagawa-kai. It had eighteen offices and about 230 known members. Police were stationed outside each office as the conflict unfolded, a visible response to the danger of further attacks.

The Konosu premises also reflected the group’s use of legitimate-looking businesses as fronts. Sekiguchi explained that private-investigation agencies were one possible cover for yakuza offices, though real-estate and construction companies were more common. The Kokusui-kai’s detective agencies could turn routine investigations into leverage: an infidelity inquiry might become an opportunity to blackmail the unfaithful spouse. The detail places the shooting within a broader local infrastructure of offices and businesses, rather than presenting the conflict as violence detached from organized crime’s everyday operations.

Aftermath and Significance

On the morning of November 18, the Tokyo Metropolitan Police Department received a call from someone claiming to be the gunman. The available account does not establish what followed that call, but its timing marks the conflict’s continuing movement from street violence into police investigation.

Sekiguchi’s explanation holds the immediate cause and the larger stakes together without treating them as interchangeable. A visit to settle an accident-related dispute preceded the shooting; the competition over Tokyo and Saitama gave that confrontation wider meaning. His warning that, once bullets had been fired, there was no going back captures the event’s decisive turn: a local encounter had crossed into a regional conflict, with police watching the organizations’ offices and the violence spreading beyond its point of origin.