Company
ABOUT COMPANY
Industrial materials supported by
a one-of-a-kind technology in Japan
In 1970, the Company established the manufacturing process for phosphorous master alloy using yellow phosphorous, a challenging substance to handle with a combustion flashpoint of 30°C.
Since then, Osaka Alloying Works is the only business in Japan that carries out the extremely difficult process of handling and alloying yellow phosphorous with other metals.
The company also manufactures cast copper alloys, titanium-additive bronze for niobium-tin (Nb3Sn) superconducting wires used in nuclear magnetic resonance (NMR) equipment, and sheet metal for cymbals.
The Company also went on to acquire a patent in 1984 for the Mizuta melt-solidification process of manufacturing copper alloys in uniform concentrations via rapid cooling with water showers.
Going forward, Osaka Alloying Works will continue to dedicate ourselves to expanding the potential of alloying technologies.
Based in Fukui, Enhancing Our Technologies and Contributing to Society
Since its founding, Osaka Alloying Works has pursued core technologies essential to society and contributed through the manufacturing of alloy products.
In 1989, in line with business expansion, we relocated our headquarters from Osaka to Fukui. In this new environment, we have worked to strengthen our production system and enhance our technological capabilities. Since then, supported by our valued customers and the local community, we have continued to grow to this day.
In recent years, amid rapid technological innovation and changing needs, the quality and performance required by our customers have become increasingly diverse. Leveraging the technologies and experience we have cultivated over many years, we approach each and every product with sincerity and strive to deliver manufacturing excellence that earns trust.
We will continue to be a company rooted in the local community, refining our technology and making every effort as a unified team to meet and exceed our customers’ expectations.
President & CEOSatoshi Kato
Overview
- Company Name
- Osaka Alloying Works, Co., Ltd.
- Address
- HQ: 45-5-9 Shirakatacho, Fukui City, Fukui Pref., Japan 910-3138
Sakai Plant: 49-111-18 Mikunicho Yonozu, Sakai, Fukui, 913-0036
- Phone
- +81 776-85-1846
- Fax
- +81 776-85-1313
- Established
- June 1935
- Incorporated
- July 1949
- Board of Directors
- President & CEO : Satoshi Kato
Senior Managing Director(General Affairs) : Masahiro Kametani
Senior Managing Director(Technology Development) : Hiroyasu Taniguchi, Ph.D. (Engineering)
Senior Managing Director(Sales) : Naoyoshi Maeda
Director(Plant Manager) : Takeru Matsumoto
Director (Non-Managing) : Takashi Soga
Director(Non-Managing) : Naoki Takebayashi
Corporate Auditor(Non-Managing) : Junichiro Kasagi
- Capital
- 61 million yen
- Number of Employees
- 48 (as of May 31, 2026)
- Primary Clients(Random order, titles omitted)
- Kobe Steel, Fukuda Metal Foil & Powder, Furukawa Electric, Mitsubishi Materials, JX Advanced Metals, Mitsui Sumitomo MetalMining Brass & Copper, NJT Copper Tube, KMCT, DOWA METAL, Mizuno Handy Harman
- Business Details
- Manufacturing and sale of master alloys
Phosphor copper, phosphor nickel, phosphor iron, phosphor tin, silicon copper, magnesium copper, copper manganese, copper-iron, nickel-copper, chromium copper, etc.
Manufacturing and sales of cast and processed copper and copper alloys
Superconducting cable bronze, OM alloy casting (wear-resistant copper alloys), etc.
- Affiliated Organizations
- The Japan Foundry Engineering Society
The Cryogenics and Superconductivity Society of Japan
Phosphorus Recycling Industry Promotion Organization
The Japan Welding Society
- Main Banks
- Fukui Bank, Mikuni Branch
Sumitomo Mitsui Banking Corporation, Fukui Branch
Company History
The Company’s first president, the late Densuke Mitani begins copper alloy casting and master alloy production as an owner-operator
(2-43 Horikami-dori, Higasahi-Yodogawa Ward, Osaka City)
Osaka Alloying Works Co., Ltd. established with capital of 500,000 yen (1336 Kashimacho, Higashi-Yodogawa Ward, Osaka City)
Capital increased to 6 million yen, Ibaraki Plant opened in Ibaraki City, Osaka
Transitioned from red phosphorous to yellow for phosphor copper raw materials
Acquired equipment and patent rights for phosphor copper manufacturing
Transferred HQ plant to Technoport Fukui in Fukui City, closed Ibaraki Plant
Transferred HQ registration to Technoport Fukui (45-5-9 Shirakatacho, Fukui City), becoming a Fukui-based company
Acquired patent for superconducting material manufacturing with the Mizuta melt-solidification method
Capital increased to 61 million yen
Became a subsidiary of JX Advanced Metals
Osaka Alloying Works Sustainability Programs
- Process water recycling
- We utilize a self-recycling format for our equipment cooling water.
We recycle our cleaning and processing water for exhaust gas processing.
This results in around 90% of the water used in our plants being recycled and used again.
- Made with recycled materials
- We use recycled materials for the metals (particularly copper) in our products.
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