AIBA Corporation, a distributing agent of Hitachi Metals, Ltd., engages in both sales and manufacturing of Yasugi steel, including cutlery steel, special steel, tool steel cuts, processed plates and forging dies.

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Contact numbers Tel: +81-256-45-6221 Fax: +81-256-45-6220

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Company overview and history

Company overview

Company nameAIBA Corporation
Capital40 million yen
EstablishmentFoundation in 1861
Legal entity in 1935
Current structure in 1965
        100th anniversary of the company establishment in 1961
        150th anniversary of the company establishment in 2011
AddressSpecialty Steel Center and Technical Center (10,078 m²)
Sakaetobu industrial park 3203 Yada, Sanjo-shi, Niigata Prefecture 959-1107
Tel: +81-256-45-6221  Fax: +81-256-45-6220
RepresentativeRyoji Aiba
BanksHokuestu Bank (Sanjo branch), Daishi Bank (Sanjo branch), Sanjo Shinkin Bank (Chuo branch)
Main suppliersHitachi Metals, Ltd., Hitachi Metals Tool Steel, Ltd., Aoyama Special Steel Co., Ltd., Mitsubishi Hitachi Tool Engineering, Ltd., Hitachi Power Solutions Co., Ltd.
Affiliated company and
Technical Center subcontractor
AIBA Seiki (precision part manufacturing)
Ookubo Forging Support (large processed product manufacturing)
AffiliationsSanjo Chamber of Commerce & Industry, Sanjo-Syoutetsu Association, Sanjo Kogyokai Cooperative, Japan Special Steel Distributors Association,
Japan Forging Association


1861Establishment as a metal wholesaler
1871Company transferred to Sanjo-machi
1891Began to sell steel
1924Became dealer for Yasugi Works
1935Became a legal entity and changed name to Aiba Partnership Company
1939Special steel business with Hitachi suspended due to restriction on steel
1946Foundation of AIBA General Partnership Restoration of the sales department as before the war
1947Special steel business with Hitachi resumed
1961100th anniversary of the company establishment
1965Change in organization and foundation of AIBA Corporation
1967Special steel office and warehouse built
1973Completion of the new company headquarters (previous headquarters)
1979Factory and warehouse extension New manufacturing equipment and machinery acquired
1983Capital increased to 40 million yen Oxy-fuel welding facilities built
1986Ryoji Aiba became president
1994Specialty Steel Center built (at 3203 Yada, Sanjo-shi)
2005Technical Center built, collaboration established with a large product processing company, and full-scale manufacturing of forging tools and accessories started
2007Eco-stage certification obtained
2011150th anniversary of the company establishment Commemorative tree planted at the Hitachi Metals Yasugi Works
Donation of relief money to Sanjo City for the 2011 Tohoku earthquake
Business collaboration with an oxy-fuel welding company
2012Woodcut representing a crested ibis given to Niigata prefectural government in commemoration of the hatching of Japanese crested ibis eggs at Sado-shima as part of environmental protection activities
2014Publication of a commemorative magazine for the 150th anniversary of the company establishment