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