Corporate History

• Receives first order for sulfuric acid generation plant.

• Company name changed to Mitsubishi Kakoki Kaisha, Ltd. (MKK)

• Delivers first air liquefaction separation plant.

• Receives first order for penicillin generation plant.
• Orders from chemical companies for ammonia synthetic plant grow strongly.

• Under Business Reconstruction and Adjustment Law, Mitsubishi Kakoki Kaisha, Ltd. (capitalized at \75 million) is reestablished as a secondary corporation to the former Mitsubishi Kakoki Kaisha, Ltd.

• MKK is listed on the Tokyo and Osaka Stock exchanges.

• Delivers first Selfjector (SJ) oil purifier for ships.

• Osaka Sales Office opens.

• Receives first order for sulfur recovery plant (Parsons type).
• Establishes Yokkaichi Factory (reorganized as Yokkaichi Works in 1973).

• Receives first order from power generation company for bar screen filter.

• Completes development of first activated sludge separator.
• Orders for industrial wastewater treatment facilities grow strongly.

• Orders for centrifugal separators (decanter and peeler types) for industrial use grow strongly.

• Kashima Factory commissioned.
• Cumulative production of SJ-OP series oil purifiers tops 10,000 units.

• Completes first large-scale wet flue-gas desulfurization plant (employing Wellman Lord process)

• Receives first order for SNG (Substitute Natural Gas) generator.
• Establishes Kakoki Kankyo Service, KK.

• Splits off works division and establishes Kakoki Koji Kaisha, Ltd. (later renamed Kakoki E&C, KK. in 1990).

• Receives order for large-scale electrode baking plant from Indonesia Asahan Aluminum.
• Completes first grey water treatment facility.
• Establishes Kakoki Trading Co., Ltd.

• Factory functions of Yokkaichi Works consolidated with Kawasaki Works and former is renamed Yokkaichi Office.

• Delivers first UASB anaerobic wastewater reactor.

• Osaka Sales Office is renamed Osaka Branch.

• Relocates head office to 1-4-28 Mita, Minato-ku, Tokyo.
• Opens Project Center in Yokohama.
• Establishes MKK Europe B.V. in Amsterdam, The Netherlands through joint capital investment with Mitsubishi Corporation.

• Osaka Branch is renamed Osaka Branch Office.
• Receives first order for permeable brick production plant using sewage sludge as raw material.
• Participates in Japanese Ministry of Health and Welfare's Eco-Land Plan (Sludge Recycling Treatment Center).

• Head office functions relocated from Mita, Minato-ku, Tokyo to the Kawasaki Works in Kawasaki-ku, Kawasaki City, Kanagawa Prefecture.
  (Head office relocated to 2-1 Ohkawa-cho, Kawasaki-ku, Kawasaki City in August 1998.)

• Subsidiaries reorganization : Three technological companies were integrated into Kakoki Plant & Environment Engineering Co., Ltd. and two service companies into Kakoki Trading Co., Ltd.
• Develops and starts deliveries of small-scale onsite hydrogen generator producing 99.999% purity hydrogen.
• Cumulative sales of OP and SJ series oil purifiers top over 60,000 units.

• Starts sales of new, compact SJ-UNIT series oil purifier.

• Receives first order for waste gas abatement system for semiconductor industry.
• Establishes Head Sales Office in Miyamae-cho, Kawasaki-ku, Kawasaki City.
• Closes down Yokohama Project Center.

• Delivers first hydrogen station for fuel-cell vehicles.

• Yokkaichi Office is renamed Yokkaichi Factory.
• Establishes Shanghai Representative Office (closed down in 2012).

• Develops MegaFuel^TM bio-fuel production system which uses sewage sludge as feed material.
• Introduces Mitsubishi-VOS Ballast Water Management System using technology from NEI Treatment Systems LLC, USA.

• Orders for hydrogen generators top 100 units since first order in 1963.
• Establishes Thailand Representative Office (closed down in 2012).

• Establishes Ryoka Trading (Shanghai) Co., Ltd. wholly owned by MKK.

• Completes second fabrication shop in Kashima factory.

• Introduces executive officer system.
• Establishes MKK Asia Co., Ltd. in Bangkok, Thailand, in order to expand operations throughout the Southeast Asia region (MKK owns a 49% equity stake).

• Cumulative production of Mitsubishi Selfjector oil purifiers tops 90,000 units.

• Mitsubishi SOx Scrubber System, Japan's first system compatible with the regulations governing SOx emissions in ship exhaust gases, jointly developed with Mitsubishi Heavy Industries, Ltd.

• Cumulative production of Mitsubishi self-injectors reaches 100,000 units.
• Transition to a company with an audit committee.

• Hydrogen station for demonstration on a commercial scale, constructed in Kawasaki Works.

• Established "Kawasaki Front Office" as a new base for the Plant Engineering Business and the Industrial Machinery Business at 580 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture.

Conducted the following organizational restructuring measures for the purposes of stabilizing the revenues of the entire corporate group and strengthening the earning capacity.

• The business of selling our oil purifiers of Ryoka Seisakusho Co., Ltd. was split off and absorbed by our company.
• Kakoki Plant & Environment Engineering Co., Ltd. absorbed Ryoka Seisakusho Co., Ltd.
  (The company name after the merger was Kakoki Plant & Environment Engineering Co., Ltd., and was renamed to Mitsubishi Kakoki Advance, Ltd. in November 2020.)
• The after-sales service business, which is part of the construction and plant engineering businesses of Yokkaichi and Kashima Factories of our company, was split off and absorbed by Kakoki Plant & Environment Engineering Co., Ltd.

• Kakoki Plant & Environment Engineering Co., Ltd. was renamed Mitsubishi Kakoki Advance, Ltd.

• Established Taiwan Branch in Taipei City, Taiwan.
• Established our head office at 580 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture, and transferred the headquarters functions from Kawasaki Works to the head office.
• Closed the marketing section of the head office and Kawasaki Front Office, and transferred each section to Kawasaki Works and the head office.

• Transferred from the first section to the Prime Market of Tokyo Stock Exchange, through the market reclassification.