Founded as Chemical Machinery Manufacturing Co., Ltd. to domesticize chemical industry machinery through investment by Mitsubishi companies
Received first order for an autoclave (reactor) as a product
Founding date: May 1, 1935 (Showa 10)
Received first order for a sulfuric acid production unit
Renamed Chemical Machinery Manufacturing Co., Ltd. to Mitsubishi Chemical Machinery Co., Ltd.
Successfully domesticated electrode firing furnaces and received first order
Received first order for an OP-type oil purifier
Delivered first air liquefaction separation unit
Received first order for a penicillin production unit
Active orders for ammonia synthesis units for chemical industry companies
Established Mitsubishi Chemical Machinery Co., Ltd. (capital 75 million yen) as the second company of the former Mitsubishi Chemical Machinery Co., Ltd. under the Corporate Reorganization Act and restarted operations
Establishment date: September 1, 1949 (Showa 24)
Listed on the Tokyo and Osaka Stock Exchanges
Received first order for a CWG (cooling water gas) plant and subsequently increased orders for city gas production units
Delivered first shipboard automatic oil purifier (SJ)
Opened Osaka branch office
Received first order for a urine digestion sludge dewatering unit for wastewater treatment plants and subsequently increased orders for water treatment machinery and equipment
Received first order for a Persons-type sulfur recovery unit
Opened the Yokkaichi plant (reorganized as Yokkaichi Manufacturing Plant in 1973)
Opened the Kisarazu factory
Received first order for a hydrogen production unit
Received first order for a power company’s bar screen
Completed the first unit of the activated sludge method
Increased orders for wastewater treatment for private companies
Increased orders for industrial machine centrifuges (decanters, peelers)
Opened the Kashima plant
Total production of oil cleaners (OP type, SJ type) surpassed 10,000 units
Completed the first unit of the large wet flue gas desulfurization system, Welman Road type (W/L type)
Received order for the first unit of an SNG (synthetic natural gas) production system
Established Kaku Kikai Environmental Services Co., Ltd.
Separated the construction division and established Kaku Kikai Construction Co., Ltd. (renamed to Kaku Kikai E & C Co., Ltd. in 1990)
Received order from Asahan Aluminum in Indonesia for a large electrode firing plant
Completed the first unit of the middle water supply system
Established Kaku Kikai Trading Co., Ltd.
Developed a supercritical gas extraction system
Received order for the first unit of an LNG satellite facility
Consolidated the factory functions of the Yokkaichi plant to the Kawasaki plant and renamed Yokkaichi plant to Yokkaichi office
Delivered the first unit of an industrial wastewater treatment facility using the UASB (anaerobic wastewater treatment) method
Renamed the Osaka sales office to Osaka branch
Developed a membrane separation, bicarbonate removal SNG (synthetic natural gas) system
Relocated headquarters to 4-28-1 Mita, Minato-ku, Tokyo
Opened a project center in Yokohama City
Established a joint venture company "MKK EUROPE B.V." in Amsterdam, Kingdom of the Netherlands, jointly funded by our company, Mitsubishi Corporation
Established a joint venture "MKK EUROPE B.V." in Amsterdam, Kingdom of the Netherlands
Renamed Osaka Branch to Osaka Headquarters
Ordered the first unit of permeable brick manufacturing equipment from sewage sludge
Participated in the Ministry of Health's Eco Land Plan (sewage sludge regeneration center)
Transferred headquarters functions from Mita, Minato-ku, Tokyo to Kawasaki Manufacturing Plant in Kawasaki-ku, Kawasaki City, Kanagawa Prefecture
(In August 1998, moved the main office to 2-1-2 Okawa-cho, Kawasaki-ku, Kawasaki City)
Dissolved Chemical Machinery N&C Co., Ltd. and established Chemical Machinery Engine Co., Ltd.
Introduced and began selling GMP-compliant horizontal centrifugal separators from domestic Cloud Maffy Co.
Merged three companies—Chemical Machinery Environmental Services, Chemical Machinery Engine, and Rihwa Giken—into Chemical Machinery Environmental Services as the surviving company, renaming it "Chemical Machinery Plant Environment Engine Co." Additionally, merged two companies—Rihwa Kogyo and Chemical Machinery Trading—into Rihwa Kogyo as the surviving company, renaming it "Chemical Machinery Trading Co."
Developed and began delivering small on-site high-purity (99.999%+) hydrogen production units
Achieved total deliveries of 60,000 units of oil purifiers (OP type, SJ type)
Three companies, Kaku Kikai Kankyo Service, Kaku Kikai Engineering Co., Ltd., and Rihwa Giken Co., Ltd., merged and changed their corporate name to "Kaku Kikai Plant Environment Engineering Co., Ltd."
Started sales of oil purifiers and new SJ unit type
Ordered the first unit of semiconductor manufacturing exhaust gas treatment equipment
Opened headquarters sales office in Miyamae-cho, Kawasaki-ku, Kawasaki City
Started sales of new Mitsubishi oil purifier model (SJ-GENIUS series)
Delivered the first hydrogen station for fuel-cell-equipped vehicles
Renamed Yokkaichi facility to Yokkaichi Factory
Established Shanghai liaison office (closed in 2012)
Developed new hydrogen production unit "HyGeia"
Implemented technology introduction of ceramic acoustic panels
Introduction of ceramic acoustic panels
Development of a high-calorific biomass fuel manufacturing system (MegaFuel™) using sewage sludge
Technology introduction of the ballast water treatment system "Mitsubishi-VOS System" from NEI Treatment Systems, USA
Since the first order of the hydrogen production unit in 1963, the cumulative orders have reached 100 units
Establishment of a Thailand resident office (closed in 2012)
Establishment of "Rihuka Trading (Shanghai) Co., Ltd." fully owned by our company in Shanghai, China (in 2019 the company name was changed to "Rihuka Machinery Technology (Shanghai) Co., Ltd.")
Established "Rihka Trading (Shanghai) Co., Ltd." in Shanghai, China
Completion of the second canning plant at the Kashima factory
Implementation of the executive officer system
Establishment of the local subsidiary MKK Asia Co., Ltd. in Bangkok, Thailand for Southeast Asian customer development (49% ownership by our company)
Established local subsidiary MKK Asia Co., Ltd. in Bangkok, Thailand
Cumulative production of the Mitsubishi oil cleaner "Mitsubishi Self-Jector" reached 90,000 units
Completion of the oil cleaner production plant at Kawasaki Works
Launch of the new Mitsubishi oil cleaner series "Mitsubishi Self-Jector HERCULES (Hercules) Series"
Development and launch of the next-generation high-efficiency hydrogen production unit "HyGeia-A (High-Jia-A)"
Joint development of the domestic first ship SOx-compliant exhaust gas cleaning device "Mitsubishi SOx Scrubber" with Mitsubishi Heavy Industries
Co-developed the domestic first ship SOx compliance exhaust gas cleaning device "Mitsubishi SOx Scrubber" with Mitsubishi Heavy Industries
The small on-site hydrogen production unit "HyGeia Series" achieves low CO
Receiving the Kawasaki brand certification and the Kawasaki Mechanism certification and award
Implementation of the "Hydrogen Creation Energy Technology Using Sewage Biogas Raw Material" demonstration project, adopted by the Ministry of Land, Infrastructure, Transport and Tourism's innovative sewage technology demonstration project (B-DASH Project), as a commissioned research from the National Institute of Technology and Policy
The small on-site hydrogen production device "HyGeia Series" achieves low CO2 emissions
Implemented "Demonstration of hydrogen production technology using sewage biogas as a raw material" adopted by the Ministry of Land, Infrastructure, Transport and Tourism's innovative sewage technology demonstration project
Cumulative production of the Mitsubishi oil cleaner "Mitsubishi Self-Jector" reached 100,000 units
Transition to a company with an Audit Committee
Construction of "MKK Kawasaki Hydrogen Station (Demonstration)" within Kawasaki Works
Opening of the new sales base "Kawasaki Front Office" for plant and standalone machinery businesses at 580 Horikawa-cho, Saiwai-ku, Kawasaki City, Kanagawa Prefecture
Opened new sales office "Kawasaki Front Office" for plant and standalone machinery businesses
Stabilize overall group revenue and strengthen profitability through the following organizational restructuring
Absorption and split of the company's oil purifier sales business by Rihkaku Manufacturing Co., Ltd.
Merger and absorption of Rihkaku Manufacturing Co., Ltd. by Chemical Plant Environment Engineering Co., Ltd.
(After the merger, the company name is Chemical Plant Environment Engineering Co., Ltd., and in November 2020 the name was changed to Mitsubishi Chemical Engineering Advanced Co., Ltd.)
Absorption and split of part of the after‑service business of the Kisarazu and Kashima factories into Chemical Plant Environment Engineering Co., Ltd.
Implemented organizational restructuring to stabilize and strengthen group profitability
Name change of Chemical Plant Environment Engineering Co., Ltd. to Mitsubishi Chemical Engineering Advanced Co., Ltd.
Established a branch office in Taipei, Taiwan
Established the head office at 580 Horikawa‑cho, Sai‑ku, Kawasaki City, Kanagawa Prefecture, and relocated head office functions from Kawasaki Factory
Closed the head office sales office and Kawasaki front office, and transferred each department to Kawasaki Factory and the head office
Moved headquarters office to Horikawa-cho, Saiwai-ku, Kawasaki City, Kanagawa Prefecture, transferring headquarters functions from Kawasaki Factory
Moved from the First Section to the Prime Market following a review of the Tokyo Stock Exchange market classification
Signed a memorandum of support for the regeneration of water source forests in Kanagawa Prefecture
Completely renovated the Kisarazu office
Announced the continuous‑rotation filter "mini CURUPO" for bench scale
World’s first technology using electric‑field filtration, "Electric Field Filter", in collaboration with Mitsubishi Chemical Engineering and Nagoya University
Co‑announced "Ele‑Fil™"
Co-announced the world’s first technology using electric field filtration, "Electric Field Filter®", with Mitsubishi Chemical Engineering and Nagoya University
Made East Sumitomo Co., Ltd. (now MKK Tohoku Co., Ltd.) a subsidiary
Announced the reorganization plan for Kawasaki Factory
Signed an official sponsorship agreement with Kawasaki Brave Thunders
Signed official sponsorship agreement with Kawasaki Brave Thunders
We have posted the presentation materials and glossary used for the "Second Quarter Earnings Presentation for the Fiscal Year Ending March 2027," held on November 18, 2026. We plan to post the presentation video and transcript article at a later date.
The Yumegasaki Project, a regional circular economy pilot based at Yumegasaki Animal Park, showcased its first original products, "Yumegori" and "Lemon Grass Vinegar," at the "Colors, Future! Summit" on November 1, 2026. The products incorporate compost made from leftover animal feed and lemon grass cultivated by local children. Both items are sold and provided for a limited time and quantity.
Mitsubishi Chemical Machinery Co., Ltd. announced that it will provide its hydrogen storage alloy delivery system to the onshore aquaculture model demonstration project in Kanagawa Prefecture on a paid loan basis. The system is scheduled to be delivered in December 2026 and will support power supply for the closed-loop aquaculture system in conjunction with solar power generation.
Mitsubishi Chemical Machinery invested in green bonds issued by Kanagawa Prefecture. The company has continued similar investments since 2021, and this is the tenth such investment. The framework of this bond has been reviewed for compliance with the Green Bond Principles 2025 and other standards, and a second‑party opinion has been obtained.
Mitsubishi Chemical Machinery announced the introduction of a restricted stock compensation plan and the reconfiguration of a performance-linked stock compensation plan.
Mitsubishi Chemical Machinery Co., Ltd. announced a reduction in its capital, capital reserve, and profit reserve.
Mitsubishi Chemical Machinery Co., Ltd. announced on October 30, 2026 that it had decided the content of the agenda to be presented at the special shareholders' meeting. The text does not contain the specific details of the agenda.
On October 30, 2026, we announced the release of the 2027 FY Q2 financial statements and the schedule for the earnings briefing. The briefing will be held for institutional investors, analysts, and media representatives on November 18, 2026, at 3:00 PM, both in person and via Zoom, and prior registration is required. The briefing materials will be posted in advance, and after the event, a video and transcript article will be published.
Mitsubishi Chemical Machinery will exhibit at the 19th Kawasaki International Environmental Technology Exhibition, showcasing hydrogen-related technologies and products that contribute to a decarbonized society. The exhibition will display hydrogen production technologies using sewage biogas as a raw material and a lineup of various hydrogen production equipment. On November 11, Naohiro Ishikawa will give a lecture on hydrogen production technology and efforts toward decarbonization technology development for high school students, and an event open to everyone will be held.
Kazuo Yokota of Mitsubishi Chemical Machinery was certified as a Marine Meister for the 8th year of Reiwa by the Japan Marine Industry Association, and received the certification on October 15, 2026. Yokota has been involved in the production, assembly, and after-service of Mitsubishi Self-Jector for about 50 years, and has also worked hard to train the next generation.