We look back on the history of the three predecessors of our company to the present.
AGE
Yokohama Denko Electric Co., Ltd.
Daito Marine Engineering Co., Ltd.
Toyo Reefer Maintenance Co., Ltd.
1950s
1960s
1970s
1980s
1990s
2000s
1966
September
Established Yokohama Denko Electric Co., Ltd.
1969
February
Moved the head office and factory to Moriya-cho, Kanagawa-ku, Yokohama
1971
December
Opened Kobe branch
Started wide area service at both east and west ports
1976
December
Successful research and development and commercialization of “Marine Growth Prevention System” with original technology
1988
March
Obtained permission for general construction electrical work business
2001
November
IS09001: 2000 certification acquired
2007
March
Moved the head office building and factory to the current address (Okano, Nishi-ku, Yokohama)
1952
December
Established Daito Marine Engineering Co., Ltd.
1973
August
Entering the container business
1974
September
Toyo Reefer Maintenance Co., Ltd. is an affiliated company
1986
March
Entering the cogeneration business
1972
July
Established Toyo Reefer Maintenance Co., Ltd.
1974
September
Established Kobe Office
1975
May
Headquarters moved to Shinagawa
1994
March
Kobe office opened
October
Yokohama office opened
2010s
2020s
2008
October 2008 Established Boltech Co., Ltd.
Yokohama Denko Electric Co., Ltd. will continue to exist, and Daito Marine Engineering Co., Ltd. and Toyo Reefer Maintenance Co., Ltd. will be absorbed and merged, and the trade name will be changed to “Boltech Co., Ltd”.
2011
August
BWMS retrofit construction started
November
Completion of new office building at Kobe Office
2013
August
Unification of electrical and mechanical sales system (Headquarters, each office)
2015
April
Integrated Cooling and Heating Division into Electricity Division
2016
April
50th anniversary of founding
2020
January
Merged with Iris Marine, a subsidiary
2021
July
Established Yokohama Office-Solution Engineering Division by reorganization within Yokohama Office
Daito Marine Engineering Co., Ltd.
1952
Daito Marine Engineering Co., Ltd.
Established Daito Marine Engineering Co., Ltd.
Yokohama Denko Electric Co., Ltd.
1966
September
Established Yokohama Denko Electric Co., Ltd.
1969
February
Moved the head office and factory to Moriya-cho, Kanagawa-ku, Yokohama
1971
December
Opened Kobe branch
Started wide area service at both east and west ports
Toyo Reefer Maintenance Co., Ltd.
1972
July
Established Toyo Reefer Maintenance Co., Ltd.
Daito Marine Engineering Co., Ltd.
1973
August
Entering the container business
Daito Marine Engineering Co., Ltd.
1974
September
Toyo Reefer Maintenance Co., Ltd. is an affiliated company
Toyo Reefer Maintenance Co., Ltd.
1974
September
Established Kobe Office
1975
May
Headquarters moved to Shinagawa
Yokohama Denko Electric Co., Ltd.
1976
December
Successful research and development and commercialization of “Marine Growth Prevention System” with original technology
Daito Marine Engineering Co., Ltd.
1986
March
Entering the cogeneration business
Yokohama Denko Electric Co., Ltd.
1988
March
Obtained permission for general construction electrical work business
Toyo Reefer Maintenance Co., Ltd.
1994
March
Kobe office opened
October
Yokohama office opened
Yokohama Denko Electric Co., Ltd.
2001
November
IS09001: 2000 certification acquired
2007
March
Moved the head office building and factory to the current address (Okano, Nishi-ku, Yokohama)
2008
October 2008 Established Boltech Co., Ltd.
Yokohama Denko Electric Co., Ltd. will continue to exist, and Daito Marine Engineering Co., Ltd. and Toyo Reefer Maintenance Co., Ltd. will be absorbed and merged, and the trade name will be changed to “Boltech Co., Ltd”.
2011
August
BWMS retrofit construction started
November
Completion of new office building at Kobe Office
2013
August
Unification of electrical and mechanical sales system (Headquarters, each office)
2015
April
Integrated Cooling and Heating Division into Electricity Division
2016
April
50th anniversary of founding
2020
January
Merged with Iris Marine, a subsidiary
2021
July
Established Yokohama Office-Solution Engineering Division by reorganization within Yokohama Office