Asset Report

Naoshima copper refinery



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Report summary

The refinery is located on Naoshima Island, Kagawa Prefecture in the Seto Inland Sea.  Sea links via the company's own wharf for 20kt vessels are excellent. Mitsubishi commenced copper smelting operations at Naoshima in 1918.  However, the refinery, with an initial capacity of 90kt/a, was not commissioned until 1969.  Capacity was increased to 166kt/a with the commissioning of No. 2 tankhouse in 1974.  Capacity was further increased to 190kt/a in July 1992 by the addition of a further 64...

What's included

This report contains

  • Document

    Naoshima copper refinery

    PDF 577.61 KB

  • Document

    Naoshima copper refinery.xls

    XLS 695.50 KB

Table of contents

  • Key facts
  • Summary and key issues
  • Location maps
  • Participation
  • Products
  • Costs
  • Economic assumptions

Tables and charts

This report includes 8 images and tables including:


  • Key facts: Table 1
  • Participation: Table 1
  • Products: Table 1
  • Costs: Table 1
  • Economic assumptions: Table 1


  • Detailed map
  • Products: Image 1
  • Costs: Image 1

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