| 1915 | Mr. Sadakichi Kajiwara started Kajiwara Iron Works as his private business in Himeji city. Start Manufacturing Pressure Vessel and Boiler |
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| 1936 | The factory moved to current Head Office Place |
| 1937 | Assigned by Navy as the designated factory and manufacture condenser/ Ladle etc. Assembly/ Finishing factory built. |
| 1944 | Machining factory built and machines installed. |
| 1945 | Assigned by Ministry of Commerce and Industry as the designated factory for Transportation machine. |
| 1950 | Re-organize and register as Kajiwara Iron Works Co., Ltd. Start manufacturing of Soot Blower. |
| 1956 | Canning factory built. |
| 1957 | Start manufacturing of Welded fitting. (Currently handled by other company) |
| 1958 | Start manufacturing of Cleaning Air tank for Diesel, steel structures, etc. |
| 1963 | Start Manufacturing of Engine Bed for Sulzer Diesel Engine. Open Matsunomoto factory. |
| 1964 | Start Manufacturing of Oil Heater (Heat Exchanger) |
| 1967 | Start Manufacturing of Exhaust Gas Boiler |
| 1969 | Start Manufacturing of Oil Boiler for Vessel. |
|---|---|
| 1971 | Open Nakashima factory. |
| 1979 | Collecting Plate manufacturing factory built at Nakashima factory. |
| 1983 | Wide size Collecting Plate factory built at Nakashima factory. |
| 1984 | Achieve ASME Stamp “U” and “UM” (Released in 1998) |
| 1995 | Achieve the license for Work of Plumbing, Painting, Thermal Insulation, Steel Structure, Equipment installation. |
| 2004 | SUNROD Heat Exchanger (Oil heater) has transferred to Kajiwara. |
| 2005 | SUNROD Heat Exchanger has renamed as “Kajiwara Heat Exchanger.” |
| 2010 | Accumulated Number of production for Oil Heat Exchanger reached to 3,000 units. |
| 2011 | Start manufacturing of Automatic Labeler. |
| 2013 | ISO 9001/ 14001 certified. |
| 2014 | Started “Kajiwara 100years memorial business”, as our new field. |
| 2018 | Inauguration of Kobe Office as the window for VOC deodorizer business. |
| 2019 | Inauguration of Tokyo Sales Office to intensify business activity of eastern Japan area. |
