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Establishment of Matsushima Coal Mine Co., Ltd. (Capital 2 million yen)
Commencement of mining at Ōshima Coal Mine
Commencement of development at Ikejima Coal Mine
Listed on the Second Market of the Tokyo Stock Exchange
Listed on the First Market of the Tokyo Stock Exchange and the Fukuoka Stock Exchange
Closed Ōshima Coal Mine and focused on Ikejima Coal Mine: one company, one mine system
Changed company name to Matsushima Kōsan Co., Ltd.
Absorbed Mitsui Mining Building Materials Sales Co., Ltd. and changed name to Mitsui Matsushima Sangyo Co., Ltd.
Established Mitsui Matsushima Australia Ltd.: first overseas corporation
Capital participation in Australian Ridel Coal Mine: obtained sales rights to Japan
Matsushima Coal Mine Co., Ltd. closed Ikejima Coal Mine
Established Mitsui Matsushima International Ltd. (overseas business management company)
100th anniversary of founding: Acquired and made a subsidiary of Japan Straw Co., Ltd.
Acquired and made a subsidiary of Clean Saafe Face Technology Co., Ltd. (now CST Co., Ltd.)
Acquired ownership of Mitsui Port Club
Transitioned to a holding company structure and changed name to Mitsui Matsushima Holdings Co., Ltd.
Acquired and made a subsidiary of Meikō Shōkai Co., Ltd.; established Port Club Operations Co., Ltd.
Acquired and made a subsidiary of KMT Co., Ltd.; acquired and made a subsidiary of Sansen Electronics Co., Ltd.; acquired and made a subsidiary of System Kyoa Co., Ltd.
Transitioned to the Prime Market of the Tokyo Stock Exchange; acquired and made a subsidiary of Nihon Katana Co., Ltd.; acquired and made a subsidiary of MOS Co., Ltd.
Acquired and made a subsidiary of Plus One Tech Co., Ltd.; acquired and made a subsidiary of Japan Chain Holdings Co., Ltd.; ended coal production and sales business due to the closure of Australian NSW Ridel Coal Mine.
Acquired M.R.F. Co. and made it a subsidiary: Started a stock investment business at MM Investments Co.
The Q2 2027 FY earnings presentation is scheduled to be held online on November 17, 2026. The earnings disclosure is planned for 4 p.m. on November 13, and participants are instructed to register via the provided URL. Small meetings for institutional investors and analysts are scheduled for November 24 and 27.
FISCO Ltd. published a company research report on us on June 29, 2026. The report is available at the specified URL. The report was prepared based on interviews, and we do not guarantee its contents.
On June 25, 2026, Shared Research Inc. released an analyst report on Mitsui Matsushima Resources Co., Ltd. The report can be viewed at the specified URL, and its contents are based on interviews and are not guaranteed by our company.