|1894||Inaugurated as Mikuni Iron Works.
Started manufacturing air compressors and moved to the current Head Office site in 1915
|1934||Reorganized as Mikuni Iron Works Co.,Ltd.
with 1 million yen as capital.
|1944||Merged with Fujimura Machinery Co.,Ltd.(inaugurated in 1907)
and started as Mikuni Jukogyo Co.,Ltd.
with 3.5 million yen as capital.
|1953||Started manufacturing oil-free air compressors incorporating graphite carbon piston rings.|
|1954||Mikuni has domestically produced the chlorine/hydrochloric acid gas compressor for the first time in Japan.|
|1960||Manufactured oil-free LPG transfer compressors.|
|1965||Developed Non-maintenance piston for inert gas compressors.|
|1968||Authorized for "High-pressure gas equipment test and manufacture"by the Minister of International Trade and Industry.|
|1969||Established Mikuni Kohan Co.,Ltd. to reinforce the service department.|
|1972||Started developing leakproof radioactive gas compressors,and established an in-house quality assurance system.|
|1973||Established Chugokumikuni Juko Co.,Ltd. to manufacture and operate for big sized machines.|
|1974||Supplied leakproof compressors for primary radio-active gas recovery to nuclear power stations.
Established Mikuni Engineering Co.,Ltd. to expand the engineering department mainly for peripheral accessories of compressors as well as the sales department primarily for overseas markets.
|1989||Capital increased to Japanese Yen 115,500,000. Debentures amounting to Japanese Yen 200,000,000 issued.|
|1994||Started the centennial memorial project in the 100th year since establishment.|
|1995||Moved Hofu factory to Daido in Hofe city and renamed as Yamaguchi Factory.|
|1997||Qualified for ISO 9001 approval. (Mikuni Factory)|
|1998||Qualified for ISO 9001 approval. (Yamaguchi Factory)
Capital tie-up with KwangShin Machine Industry Co.,Ltd.
|2000||Established Yamaguchi The Third Factory(Casting Factory)
Capital investment toTakagi Tekkousho Co.,Ltd. (Steel Work Factory)
|2006||Concentration to Yamaguchi factory of production line and expansion of Yamaguchi Factory.
Started memorial event in 111th year since establishment.
Capital increased to Japanese Yen 439,000,000.