History

Copper & Cooper Alloy Products Div. of Mitsubishi Materials has always accommodated needs of customers and expanded its business in line with Japanese industrial development.
While we are the largest company in the Copper & Cooper Alloy Business in Japan, we continue to take our steps forward for future as ever.

Copper & Copper Alloy Business Unit,
MITSUBISHI MATERIALS

Old MITSUBISHI SHINDOH

1891
Inauguration of the Osaka Refinery attached
to the Ikuno branch of Imperial Property Office
of the Imperial Household Ministry
1896
Transfer of management to Mitsubishi Goshi Kaisya
1905
Commenced commercial production of ingots
by mold casting of copper cathode.
1925
Established with capital of 300 thousand yen, named DAI-ICHI SEIHYO CO., LTD.
[ Mitsubishi Shindoh Co., Ltd. ]
1930
Renamed as DAI-ICHI SANGYO CO., LTD.
[ Mitsubishi Shindoh Co., Ltd. ]
1935
Commenced manufacturing of copper alloy products (mainly copper and brass rod and sheet) with capital of 200 thousand yen.
[ Sambo Copper Alloy Co., Ltd. ]
1937
Wakamatsu Factory (currently as Wakamatsu Plant) was established. Nonferrous metal rolling business was started. Capital increased to 2 million yen.
[ Mitsubishi Shindoh Co., Ltd. ]
1942
Renamed as NISSO WORKS CO., LTD.
[ Mitsubishi Shindoh Co., Ltd. ]
1950
Commenced production of billets
1952
Commenced production of wirerods
by hot rolling of copper bar
1954
Expansion into metallization industry.
[ Mitsubishi Shindoh Co., Ltd. ]
Built status as general copper alloy manufacturer covering all copper alloy products such as sheet and plate, strip, pipe, rod and bar, and wire.
[ Sambo Copper Alloy Co., Ltd. ]
1957
Renamed as TAMAGAWA METAL & MACHINERY CO., LTD.[ Mitsubishi Shindoh Co., Ltd. ]
1970
Installed industry-first 3,000 ton extruder.
[ Sambo Copper Alloy Co., Ltd. ]
1971
Commenced production of wirerods by SCR,
which was developed by Southwire Company
in the U.S.
1972
Commenced production of lead frame materials for semiconductors.
[ Mitsubishi Shindoh Co., Ltd. ]
1974
Built Technological Research Institute inside Head Office.
[ Sambo Copper Alloy Co., Ltd. ]
1986
Renamed as MITSUBISHI SHINDOH CO., LTD.
[ Mitsubishi Shindoh Co., Ltd. ]
Started operation of reversible hot rolling mill
[ Sambo Copper Alloy Co., Ltd. ]
1989
Moved and Started new operation as Sakai Plant
Started operation of 12-stage cold rolling mill
[ Sambo Copper Alloy Co., Ltd. ]
1990
Mitsubishi Metal and Mitsubishi Mining & Cement merge
to form Mitsubishi Materials Corporation on December 1.
Begun production of billets and cakes made by Oxygen
free copper melted by electric furnace.
1993
Opened Onahama Plant
Installed and started operations of new horizontal
continuous melting and casting machine
[ Sambo Copper Alloy Co., Ltd. ]
1995
Commenced production of copper anodes and copper alloys.
Established RYOSHINDOH MANUFACTURING
(MALAYSIA) SDN. BHD.
[ Mitsubishi Shindoh Co., Ltd. ]
1999
Commenced produciton of high purity copper
2000
Commenced production of ROX™
which is oxygen-free copper wirerod by
employing copper melting shaft furnace.
Obtained certification of ISO14001 at Sakai Plant
［Sakai Plant］
2001
GOTOH MFG CO., LTD. and GOTOH PHILIPPINES CORPORATION became our subsidiaries.
[ Mitsubishi Shindoh Co., Ltd. ]
Developed EcoBrass lead-free brass alloy
[ Sambo Copper Alloy Co., Ltd. ]
2002
Obtained certification of ISO9001 at Sakai Plant.
[ Sakai Plant ]
2003
Obtained the ISO 14001 certification at Wakamatsu Plant.
[ Mitsubishi Shindoh Co., Ltd. ]
Transferred forging business to Sambo Forging Co., Ltd.
[ Sambo Copper Alloy Co., Ltd. ]
2004
Commenced production of oxygen-free copper
billets and cakes by employing copper melting
shaft furnace.
Started Copper & Copper Alloy Development
Center at Onahama Plant.
2005
Installed and started operations of new No. 2 AP Line
[ Sambo Copper Alloy Co., Ltd. ]
2006
Became a wholly-owned subsidiary of Mitsubishi Materials Corporation.
[ Mitsubishi Shindoh Co., Ltd. ]
2007
Became a wholly-owned subsidiary of Mitsubishi Materials Corporation.
[ Sambo Copper Alloy Co., Ltd. ]
2008
Through merger of both companies, the new integrated company, "Mitsubishi Shindoh Co., Ltd.," was started.
2010
March 19, Installed and started opetation of New Rolling Facilities in Sambo Plant.
Qingdao Ecobrass Co., Ltd. was established in Qingdao
2013
Commenced production of copper alloy wires
made with ROX™
2015
Amagasaki Electric Wire becomes a subsidiary
2017
Acquired the Special Products Division
of the Luvata Group, which specializes
in the processed copper products