History
| 1892 | The founder, Heikichi Ihara established Ihara-gumi in Osaka as a furnace construction contractor. |
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| 1896 | Constructed 2 semi-gas type bottle glass furnaces as a special vender when Osaka Brewery Co., Ltd constructed their bottle manufacturing plant. |
| 1903 | Heikichi Ihara supervised to construct a Siemens type bottle glass furnace in India. |
| 1909 | Constructed a sheet glass furnace using Belgium type manual blowing cylinder method, in Amagasaki plant, Asahi Glass Co., Ltd. |
| 1919 | Constructed a Siemens type sheet glass furnace in Wakamatsu plant, Nichibei Sheet Glass Co., Ltd. (current Nippon Sheet Glass Co., Ltd.) |
| 1928 | Constructed a fourcault type sheet glass furnace in Amagasaki plant, Asahi Glass Co., Ltd. |
| 1939 | Constructed a continuous heating furnace and a holding furnace for steel sheet in Hirohata works, Japan Iron & Steel Co., Ltd. (current Nippon Steel Corporation) |
| 1948 | Established Ihara Furnace Construction Co., Ltd. with capital of 500,000 yen. |
| 1953 | Constructed a titanium manufacturing rotary kiln in Yokkaichi plant, Ishihara Sangyo Co., Ltd. |
| 1954 | Constructed a glass furnace for cathode ray tubes for Asahi Special Glass Co., Ltd. |
| 1958 | Iwao Ihara took up a post as president. |
| 1960 | Constructed a copper reverberatory furnace for Sambo Copper Alloy Co., Ltd. |
| 1961 | Constructed the No. 3 open hearth furnace in Wakayama works, Sumitomo Metal Industries, Ltd. |
| 1962 | Established Kanto office. |
| 1964 | Officially opened Yokohama office and Kyushu office. Designated as a refractory distributor by Asahi Glass Co., Ltd. Constructed a float type sheet glass furnace in Tsurumi plant, Asahi Glass Co., Ltd. |
| 1966 | Established Iho branch office, Osaka office (in Takasago, Hyogo). |
| 1967 | Changed company name to Ihara Furnace Co., Ltd. Separated the design and construction department of acid-resisting works to be independent, and established Acid Kogyo Co., Ltd. |
| 1968 | Separated glass-material (cullet) manufacturing department to be independent, and established Ihara Kousan Co., Ltd. |
| 1970 | Established Tokuyama branch office. |
| 1971 | Established Iwao Co., Ltd. |
| 1972 | Established Aichi office (current Nagoya office). Separated refractory finishing department to be independent, and established Ihara Kozai Co., Ltd. Separated ALC department to be independent and established Ihara Kaken Co., Ltd. Introduced technologies of Offen-periscope and Radiation Metallic Recuperator. |
| 1973 | Constructed a human-waste treatment plant for Tsushima Central Area Cleansing #1 Association. |
| 1975 | Organized Incinerator Group (current Environment Equipment Department). |
| 1976 | Developed rapid-heating-up technology jointly with Asahi Glass Co., Ltd. Construct a municipal waste incineration plant in Gushikawa, Okinawa. |
| 1977 | Increased capital to 90 million yen. |
| 1980 | Development day tank fully-electric melting furnace. |
| 1981 | Established technical cooperation with Gadelius Co., Ltd. (currently Alstom Co., Ltd.) for “Manufacturing and selling Combustall”. |
| 1982 | Developed far-infrared application technology (furnace for drying and printing printed circuit board, and heating furnace for forming X sheet). |
| 1984 | Developed and delivered No. 2 machine of "drown draft type joint kiln" for Yasuda Glass Industries, Co., Ltd. (request by Osaka Gas Co., Ltd.)
Designated as an exclusive distributor of CRI for "electric booster for glass furnaces." |
| 1987 | Established Taiwan branch. |
| 1988 | Finished Research & Development of “Highly-efficient pot furnace”, and held an open presentation meeting (commissioned by Smaller Enterprise Corp.). |
| 1991 | Established Singapore branch. |
| 1992 | Established Shanghai Yaohua Ihara Furnace Co., Ltd. (current Shanghai Ihara Furnace Co., Ltd.) |
| 1995 | Finished Research & Development of “Cullet preheating glass melting system using heat generated by the combustion of waste”, and held an open presentation meeting (commissioned by Smaller Enterprise Corp.).
Established selling cooperation with Antonini (Italy) for "Slow cooling furnace." |
| 1997 | Established PT. Ihara Teknis Indonesia (Jakarta, Indonesia). |
| 1998 | Developed "Dry honeycomb rapid gas cooling system." |
| 2002 | Earned ISO 9001:2000 certification |
| 2004 | Shinichi Ihara took up a post as president, and Iwao Ihara took charge of adviser to the board.
Received an order of renewing a flue gas treatment equipment of the wood waste fired boiler for Reverse, Co., Ltd. (Osaka) from Takuma Plant Co., Ltd. Constructed gas generation equipment for Sumitomo Metal Industries, Ltd./Sumikin Recycle Co., Ltd. (in Kashima works). |
| 2005 | Renamed to Shanghai Ihara Furnace Co., Ltd. (former Shanghai Yaohua Ihara Furnace Co., Ltd.) |
| 2006 | Closed down Singapore branch. |
| 2007 | Established IFC KOREA Co., Ltd. (Gumi,Korea) |
| 2008 | Etsuji Ihara took up a post as president. |
| 2018 | Abandonment of ISO9001:2015 cirtification by voluntary management start |