Private company

Sompo Japan Nipponkoa

Logo: NKSJ Holdings, Inc., Public domain, via Wikimedia Commons3

Sompo Japan Nipponkoa is a Japanese insurance company based in Sompo Japan Building, founded in 2002.1

損害保険ジャパン株式会社（そんがいほけんジャパン、英: Sompo Japan Insurance Inc.）は、 東京都新宿区西新宿に本社を置く、日本の大手損害保険会社。SOMPOホールディングスの中枢を担う企業である。主に安田財閥を中心として形成された芙蓉グループに属する。略称は「損保ジャパン」（そんぽジャパン）。2 From the Japanese Wikipedia, CC BY-SA 4.0

Last updated Oct 20, 2026.

Overview

2002Founded1
  • Industryinsurance industry1
  • HeadquartersSompo Japan Building1
  • Websitewww.sjnk.co.jp
  • Legal formkabushiki gaisha1

See how the biggest companies compare on our leaderboards

Sompo Japan Insurance Office Building
Photo: Kure, Public domain, via Wikimedia Commons4

Corporate structure

Sompo Japan Nipponkoa is part of a group headed by SOMPO. 37 entities, 8 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • SOMPO 東京都 新宿区, Japan
    • Sompo Japan Nipponkoa Sompo Japan Building
    • Nipponkoa Insurance Co. Subsidiary · Chiyoda-Ku, Japan
    • Sompo Direct Insurance Inc. Subsidiary · Tokyo, Japan
    • Sompo Himawari Life Insurance Inc. Subsidiary
    • Sompo Japan Insurance Subsidiary · Shinjuku Ku, Japan
    • ENDURANCE U.S. HOLDINGS CORP. Subsidiary · Dover, Delaware, United States
      • ENDURANCE ASSURANCE CORPORATION Subsidiary · Harrison, New York, United States
        • ENDURANCE AMERICAN INSURANCE COMPANY Subsidiary · Harrison, New York, United States
        • ENDURANCE AMERICAN SPECIALTY INSURANCE COMPANY Subsidiary · Purchase, New York, United States
        • ENDURANCE RISK SOLUTIONS ASSURANCE CO. Subsidiary · Purchase, New York, United States
        • Sompo America Insurance Company Subsidiary · Purchase, New York, United States
      • ENDURANCE SERVICES LIMITED Subsidiary · New York, New York, United States
    • RIVERSTONE CORPORATE CAPITAL 5 LIMITED Subsidiary · Brighton, United Kingdom
      • SYNDICATE 5151 Subsidiary · London, United Kingdom
    • Sompo International Holdings Ltd. Subsidiary · Hamilton, Bermuda
      • ENDURANCE SPECIALTY INSURANCE LTD. Subsidiary · Pembroke, Bermuda
        • SOMPO INTERNATIONAL HOLDINGS (EUROPE) LIMITED Subsidiary · London, United Kingdom
          • 2 more
        • SOMPO WORLDWIDE HOLDINGS LIMITED Subsidiary · London, United Kingdom
          • 1 more
        • Endurance Specialty Insurance Ltd., Pembroke (Bermuda), Zurich Branch Branch · Pembroke, Bermuda
    • Sompo Life Re Ltd. Subsidiary · Pembroke, Bermuda
    • エヌ・デーソフトウェア株式会社 Subsidiary · 山形県 南陽市, Japan
    • 損害保険ジャパン株式会社 Subsidiary · 東京都 新宿区, Japan
    • ＳＯＭＰＯひまわり生命保険株式会社 Subsidiary · 東京都 新宿区, Japan
    • ＳＯＭＰＯアセットマネジメント株式会社 Subsidiary · 東京都 中央区, Japan
      • NUVEEN US EQUITY LONG & SHORT FUND Fund · George Town, Cayman Islands

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

What it owns

What Sompo Japan Nipponkoa reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Stakes and holdings (Wikidata)

Things Wikidata records the company as owning, with the share when stated.1

Subsidiaries and ownership

Parent company

Also owns

From Wikidata.1

Acquisitions

  1. Succeeded Nipponkoa Insurance Co.1
  2. Succeeded Sompo Japan Insurance1
  3. Succeeded by Sompo Japan Insurance1

Timeline

  1. 2002Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2
  3. 3
  4. 4