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Mitsui to Invest US$297 million for Robe River J/V Mine Development in Western Australia

Dec. 27, 2007


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Mitsui & Co., Ltd.("Mitsui") announced today that it will invest US$297 million through its 100% subsidiary Mitsui Iron Ore Development to develop Mesa A / Warramboo mine in the Pilbara region of Western Australia.

Total reserves of high grade iron ore across the Mesa A / Warramboo deposits are estimated at 249 million tons. The new mine will have a full scale capacity of 25 million tons per annum and is expected to start production in 2010. The total mine life of Mesa A is expected to be 11 years. With this addition, total production of Robe Valley pisolite ore will be maintained at 32 million tons per annum. A 49-kilometer rail extension will connect the new mine to the existing rail network.

The project capital cost is estimated at US$901 million.

Notice:
This press release includes forward-looking statements about Mitsui. These forward-looking statements are based on the current assumptions and beliefs of Mitsui in light of the information currently available to it, and involve known and unknown risks, uncertainties and other factors. Such risks, uncertainties and other factors may cause Mitsui's actual results, performance, achievements or financial position to be materially different from any future results, performance, achievements or financial position expressed or implied by these forward-looking statements. The risks, uncertainties and other factors referred to above include, but are not limited to, those contained in Mitsui's latest annual report on Form 20-F, which has been filed with the U.S. Securities and Exchange Commission.
This press release is published in order to publicly announce specific facts stated above, and does not constitute a solicitation of investments or any similar act inside or outside of Japan, regarding the shares, bonds or other securities issued by us.

Information

For inquiries on this matter, please contact

Mitsui & Co., Ltd.
Investor Relations Division
Telephone: +81-3-3285-7910
Facsimile: +81-3-3285-9819
infoTKADZ@mitsui.com
Mitsui & Co., Ltd.
Corporate Communications Division
Telephone: +81-3-3285-7562
Facsimile: +81-3-3285-9819