Masahisa Takenaka

Masahisa Takenaka — Fourth-generation Yamaguchi-gumi boss.

Role and period

Fourth-generation Yamaguchi-gumi boss.

Primary organization/context: Yamaguchi-gumi. Period: 1984–1985.

Why this person matters

His assassination helped ignite the Yama-Ichi War.

This profile is designed as a canonical node rather than a stand-alone celebrity biography. The priority is to show where this person sits in the hierarchy, who they succeeded or challenged, which organization they belonged to at different points in time, and which events changed their position.

Network position

The strongest existing the archive connections are Yamaguchi Gumi, Yama Ichi War, Assassination Of Masahisa Takenaka, Yamaguchi Gumi Succession Crisis. Those links should be treated as dated relationships where affiliation or leadership changed over time.

Expansion path

A later deep audit should add: – verified birth/death dates where available; – exact leadership titles and dates; – convictions, sentences or major court outcomes where applicable; – major rivals, allies and succession relationships; – documented events that justify the person’s place in the Japan graph.

This profile should enrich the existing canonical profile rather than create parallel pages for the same individual.

Sources / audit anchors

– [Japan National Police Agency — Police of Japan / Organized Crime](https://www.npa.go.jp/english/) — Primary official background source for designated boryokudan, enforcement and organized-crime policy. – [Japan National Police Agency — White Papers](https://www.npa.go.jp/publications/whitepaper/) — Primary archive for historical and modern boryokudan data.

Why this profile matters

Takenaka is central to the modern Yamaguchi-gumi story because his leadership belongs to the succession crisis and factional violence that reshaped the organization in the 1980s. His profile should therefore be read as part of an organizational transition rather than simply as the biography of a senior yakuza figure.

Connections across the archive

The key links are Yamaguchi-gumi, the leadership succession around the fourth-generation structure and the people connected to the conflict that followed. These relationships give the Japan section chronological depth: leadership changes can be followed from person to organization to factional event, then forward into the later Yamaguchi-gumi branches already represented in the archive.

Documented network

Yamaguchi gumi (organization): Masahisa Takenaka is historically documented as affiliated with or leading Yamaguchi-gumi.

yamaguchi gumi (organization) is recorded in the canonical graph as related to, documented status, 90% confidence. This is the stored relationship and should not be expanded beyond what the source record supports.

yama ichi war (event) is recorded in the canonical graph as related to, documented status, 90% confidence. This is the stored relationship and should not be expanded beyond what the source record supports.

assassination of masahisa takenaka (event) is recorded in the canonical graph as related to, documented status, 90% confidence. This is the stored relationship and should not be expanded beyond what the source record supports.

yamaguchi gumi succession crisis (event) is recorded in the canonical graph as related to, documented status, 90% confidence. This is the stored relationship and should not be expanded beyond what the source record supports.

Timeline and case connections

Structured events are kept separate from general biography so later audits can update a date, conviction, organizational change, killing or court outcome without rewriting unrelated material.

Status and record

The structured life-status field is unknown. This administrative field should change only when a reliable current source supports an update.

Source record

The current Master package attaches the following evidence sources to this profile: – Riot police mobilized after Takenaka killing — UPI, Tier 2. – Hard-Up Yakuza Struggle to Earn a Living — Nippon.com, Tier 2. – Yakuza: Japan's Criminal Underworld — University of California Press, Tier 2. – Japan National Police Agency — Police of Japan / Organized Crime — Tier 2. – Japan National Police Agency — White Papers — Tier 2.

Each source supports only the claims tied to it. Structured source references remain attached so later audits can trace timeline and relationship records back to evidence.

Evidence and editorial boundaries

For living subjects especially, legal claims and current status require dated sourcing. Future expansion should therefore come from stronger records or newly processed canonical entities rather than unsourced crime lore.

How this profile fits the archive

The current source package includes Riot police mobilized after Takenaka killing; Hard-Up Yakuza Struggle to Earn a Living; Yakuza: Japan's Criminal Underworld; Japan National Police Agency — Police of Japan / Organized Crime; Japan National Police Agency — White Papers. These records define the safe editorial boundary for the page. A later pass should prioritize new primary documents, court outcomes, dated organizational changes, prison history or newly processed books and screen works rather than adding generic background.