History
| 1947 | Incorporated as Yamamizu Company Ltd. with 180,000 yen capital for sale of foodstuffs and porcelain |
| 1948 | Capital increased to 1 million yen |
| 1952 | Appointed by Gamlem Chemical Co., U.S. as exclusive distributor in Japan for petrochemical additives and chemical solvents |
| 1956 | Started the sale of fuel oil and lubricating oil for ships Capital increased to 5 million yen |
| 1957 | Changed company name to Yamamizu Trading Co., Ltd. and started the business of chemical cleaning of ship tanks and engines |
| 1961 | Succeeded in the development of tank cleaning machines and various gas-freeing apparatuses |
| 1963 | Succeeded in the development and sale of equipments to prevent marine pollution such as oil fence, oil dispersant, and oil recovery apparatuses, etc. |
| 1964 | Capital increased to 20 million yen |
| 1967 | Capital increased to 51 million yen |
| 1969 | Started the business of design, construction, and sale of polluted water disposal systems for environmental protection, and sound insulation systems |
| 1975 | Capital increased to 100 million yen |
| 1976 | Established a corporation in Singapore and expanded overseas sales services network |
| 1978 | Developed large-capacity crude oil washing machines and automatic deck-washing machines |
| 1983 | Succeeded in joint development, manufacture, and sale of low grade fuel oil treatment device |
| 1989 | Started the sale of sludge build-up preventive agitation device for large oil storage tanks |
| 1992 | Changed company name to Exeno Yamamizu Corporation |
| 1999 | Established ship agency division |
| 2000 | Started ship operation and grain transportation |
| 2002 | Capital increased to 300 million yen |
| 2003 | Established S&P division |
| 2004 | Started ship registration agent |
| 2005 | Renewed Yokohama Branch Office and renamed it Yokohama Logistics Center |
| 2005 | Established Honda Heavy Industries Co., Ltd. |
| 2006 | Capital increased to 450 million yen |
| 2013 | Partial business reorganization with Yamamizu Shipping Co., Ltd. Inherited YAMAMIZU Index |
| 2015 | Moved Yokohama Logistics Center and renamed it Shinagawa Logistics Office |
| 2017 | Established Energy dept |
| 2021 | Capital stock reduced to 90 million yen The amount equal to the reduction in stated capital will be shifted to other capital surplus |