Matsuba-kai

Matsuba-kai developed from an older Tokyo underworld lineage associated with Sekine-gumi. It became a formally designated boryokudan and remained part of the metropolitan organized-crime landscape despite being much smaller than Yamaguchi-gumi, Inagawa-kai or Sumiyoshi-kai. Its page gives the graph a useful mid-sized Tokyo organization outside the big three.

Why this profile matters

This profile expands an existing canonical the archive node rather than creating a duplicate. Its main purpose is to make the Japan knowledge graph denser by connecting regional groups, people, conflicts and legal changes.

the archive connections

Masaru Sekine, Yoshimasa Ito, Yakuza, Postwar Yakuza Expansion.

Sources

– [Japan National Police Agency — White Paper 2010, List of Designated Boryokudan](https://www.npa.go.jp/hakusyo/h22/english/White_Paper_2010_5.pdf) — Official historical table covering regional syndicates and their areas of influence. – [Japan National Police Agency — Police of Japan 2021, Designated Boryokudan Groups](https://www.npa.go.jp/english/Police_of_Japan/police-of-japan2021/001/001.pdf) — Official list of designated boryokudan groups, offices and membership figures as of end-2020.

Connected records

How to read the network