Kobe Yamaguchi-gumi

Kobe Yamaguchi-gumi was created in 2015 when senior bosses defected from the sixth-generation Yamaguchi-gumi.

The breakaway immediately became one of the most important organizations in Japan’s criminal underworld because it was not built from outsiders. Its founders were men who had spent years inside the structure they were now opposing.

The 2015 rupture

In August 2015, thirteen direct Yamaguchi-gumi bosses left the parent syndicate.

The new organization was led by Kunio Inoue, a powerful figure from Yamaken-gumi.

U.S. Treasury reporting later described Kobe Yamaguchi-gumi as a major breakaway syndicate and identified Osamu Teraoka as one of Inoue’s senior lieutenants.

The departure removed a substantial share of Yamaguchi-gumi’s membership and affiliate structure.

Why the split happened

The fracture emerged from long-running tensions over internal power.

The sixth-generation Yamaguchi-gumi leadership was dominated by figures linked to Kodo-kai, especially Shinobu Tsukasa and Kiyoshi Takayama.

Older Kobe-centered factions, including Yamaken-gumi, had their own institutional histories and expectations about how the parent syndicate should be run.

When those tensions broke into the open, the result was not a leadership challenge from inside.

It was secession.

Conflict with Yamaguchi-gumi

Japanese police recorded repeated violence after the split, including shootings, assaults and vehicle attacks against properties associated with rival factions.

The conflict was especially difficult because former allies suddenly occupied opposing organizations.

Offices, members and territories that had once belonged to the same federation became contested nodes.

Internal fragmentation

Kobe Yamaguchi-gumi later suffered its own defections.

Yoshinori Oda broke away and formed the group that became Kizunakai.

Ikeda-gumi, another important faction, also became independent.

Most damaging of all, Yamaken-gumi—the organization most closely associated with Inoue’s rise—later moved away from Kobe Yamaguchi-gumi.

The breakaway had fractured again.

A shrinking but important organization

The Japanese underworld has been contracting under anti-bōryokudan legislation, exclusion ordinances and financial restrictions.

Kobe Yamaguchi-gumi exists inside that larger decline.

Yet its importance remains disproportionate to simple membership counts because the group represents one of the clearest modern examples of a major yakuza federation splitting from within.

the archive connections

This profile should link directly to Kunio Inoue, Osamu Teraoka, Yamaken-gumi, Yamaguchi-gumi, Shinobu Tsukasa, Kiyoshi Takayama, Kodo-kai, Kizunakai, Ikeda-gumi, and the 2015 Yamaguchi-gumi Split.

It is one of the principal bridges between organization history and modern conflict.

Sources

– [Japan National Police Agency — Police of Japan 2021, Fight against Organized Crimes](https://www.npa.go.jp/english/Police_of_Japan/police-of-japan2021/001/001.pdf) — Official NPA background on Kobe Yamaguchi-gumi, Kizunakai and ongoing conflict. – [Japan National Police Agency — White Paper 2017, Measures against Organized Crime](https://www.npa.go.jp/hakusyo/h29/english/p30-31_WHITE_PAPER_2017_E_30.pdf) — Official NPA discussion of the post-2015 Yamaguchi-gumi split and violence. – [U.S. Treasury — Targets New Yakuza Syndicate](https://home.treasury.gov/news/press-releases/jl0694) — Official designation identifying Kobe Yamaguchi-gumi leadership and the 2015 breakaway.