1864:
| Company founded |
1906:
| Production of petroleum engines begins |
| 1924: | Production of 16PS diesel engine with airless oil spray begins |
1935:
| A large number of exports of 120PS and 300PS diesel engines were made to foreign countries. |
1944:
| The company was changed to a joint-stock company |
| 1954: | Business alliance with Sumitomo Corporation |
| 1955: | Four-stroke direct connected low-speed diesel engines (2,000ps, 10,000ps) Development/Manufacture (1985) |
1959:
| Production of rotary blowers begins |
| 1972: | Production of automatic generation line for propane gas container begins |
| 1975: | Developed low-noise IRS-type blowers |
| 1993: | Announced the world’s first large three-stage integrated vacuum pump |
| 1997: | Established SIE, a joint venture in Thailand |
| 2001: | A new SIE factory was completed |
| 2002: | ISO9001 certificated |
| 2003: | Started the sales of high-pressure compatible J-type blowers |
2005:
| Started the sales of high-stiffness IRT-type blowers |
| 2006: | Established the Tokyo Branch and the Chiba Service Center |
| 2008: | No.2 Machining plant built for machinery upgrade. |
| 2010: | Started the sales of compact, high-speed IRH-type blowers |
2011:
| No.4 Machining plant built for super-large rotor machining. |
2012:
| Developed ultra-large vacuum pumps IRV-9 and IRV-7 |
| 2014: | Held events to commemorate the 150th anniversary of the company's founding |
