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Private company

JCO

Japanese nuclear fuel cycle company

JCO is a Japanese nuclear fuel cycle company established in October 1979 as a wholly owned subsidiary of Sumitomo Metal Mining Co., Ltd. as Japan Nuclear Fuel Conversion Co.2 Its chief executive is Kenji Kirishima.1 It employed 32 people in 2018.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Oct 1979Founded1

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JCO is a Japanese nuclear fuel cycle company established in October 1979 as a wholly owned subsidiary of Sumitomo Metal Mining Co., Ltd. as Japan Nuclear Fuel Conversion Co.2

Corporate structure

JCO is part of a group headed by Sumitomo Metal Mining. 9 entities, 5 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Sumitomo Metal Mining 東京都 港区, Japan
    • JCO Tōkai-mura
    • Cerro Verde Stake · 21% · Arequipa, Peru
    • SMM GOLD COTE INC. Subsidiary · Vancouver, British Columbia, Canada
    • Sumitomo Metal Mining America Inc. Subsidiary · Wilmington, Delaware, United States
      • SUMITOMO METAL MINING OCEANIA PTY LTD Subsidiary · 100% · Sydney, Australia
      • SMM MORENCI INC. Subsidiary · Wilmington, Delaware, United States
      • SUMITOMO METAL MINING ARIZONA, INC. Subsidiary · Wilmington, Delaware, United States
    • SUMITOMO METAL MINING CANADA LTD. Subsidiary · Vancouver, British Columbia, Canada

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.

Leadership

Who has led JCO, and when. Pick a name to see everywhere that person has worked.

Subsidiaries and ownership

Parent company

From Wikidata.1

Employees over time

  • 2018321

Timeline

  1. Oct 1979Founded Founded1

Sources

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

  1. 1
  2. 2