Nonferrous metals

As the heat-resistant structural materials for the low-temperature environment in large-sized LNG (liquefied natural gas) storage tank and reactor containment vessels, the demand for nickel-based welding materials increased.

As corrosion-proof stainless steels with soft-magnetic properties, the handling of materials that are widely used for solenoid valves and pumps was started.

Electromagnetic stainless steels (K-M series)

Our rare metal magnets which are attached to the cantilever for the cartridge (magnetic head) for LP records captured approximately 90% global market share mainly in the European and American markets as the beginning of our internationalization.

Audio magnetic head, phonograph needle cartridge, and VTR sound head

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• Cartridge (magnetic head)

After that, the sales of magnetic head parts (shield case and laminated core) increased significantly for cassette tape recorders that were spreading rapidly.

Shield case and laminated core for cassette tape recorder

Shield case manufacturing equipment (Transfer press)

We produced solenoid coils used for the shutter opening/closing structure to deliver them to camera manufacturers.

Small-sized shutter magnets for cameras

We assembled and manufactured a product that automatically cleans the surface of the disk for information recording such as CD-ROMs.

Disk cleaner for magnetic optical disks

We designed, manufactured, and sold machines for measuring the magnetic property of various types of metals. The metal magnetism stress measuring instrument (Sigmatron) measures stress in a non-destructive and non-contact manner, applying the magnetostrictive effect generated when a magnetic field is given to an ferromagnetic material.

Metal magnetism stress measuring instrument (Sigmatron)

Material checker

Three-dimensional gauss meter

We manufactured and sold steel belts as mechanism components that drive the magnetic heads of hard disk drives (HDDs) at high speed. Since there were countless microscopic cracks on the end face of a steel belt, we performed the PSP process, which was a polishing technology we developed in order to eliminate the cracks. This enabled the extension of the service life, which was highly evaluated as an industry standard.

Steel belts for HDDs

PSP processing

Precise Polishing

A heat treatment furnace was introduced for the purpose of heat-treating nuclear power and aircraft parts, and so forth, in a vacuum without causing oxidization. After that, we started the vacuum brazing of industrial equipment parts using nickel-base brazing filler metals.

V01 vacuum heat treatment furnace

Vacuum Brazing

We developed a self-preserving and energy-saving isolation valve mounted on a gas meter for city gas and other gas that plays a role in shutting off a gas line in an emergency such as an earthquake. This product was adopted by a leading city gas manufacturer and has been delivered to this manufacturer for over 30 years.

Shut off valve for city gas

Our shut off valve on a gas meter

shut off valve

Return button (A manual return device that opens the closed shut off valve)

We sold coil materials for nuclear fuel support grids and wafer retention springs for metallic thin film manufacturing device components.

We started the sales of wafer retention plates for atmospheric CVD devices.

Wafer retention plates made of heat-resistant alloy for atmospheric CVD devices

For semiconductor manufacturing devices, we established an anodizing treatment technology for enhancing the durability of the surface of aluminum parts. This reduced the degree of ware of manufacturing device components and contributed to the resource saving and customer’s cost reduction through the regeneration of surface films.

Initial anodizing treatment equipment

We started the production of MR sensors that can read the magnetic ink on paper currencies to distinguish real ones from fake. After that, the demand for these sensors increased due to the introduction of the euro and the switch to new paper currencies by each country.

MR sensors

MR sensors（magnetic resistive element）

We started the production of electromagnetic proportional valves that play a role in proportionally controlling the gas flow. They are installed in mass flow controllers.

Electromagnetic proportional valves

Solenoids

We started the production of compact solenoids characterized by low profile and high adsorption power using the magnetic circuit designing technology. Initially, the demand for this product as a part for CD-ROM drive for lap top PCs increased. After that, this product has been developed into for various applications such as camera and power-saving switches.

Compact Solenoid

Compact Solenoid

By applying the surface treatment technology cultivated in semiconductor manufacturing devices, we started the machining and anodizing treatment of larger liquid crystal manufacturing device components. After that, in order to respond to the demand for large liquid crystal display TVs, which spread rapidly in the 2000s, we promoted the increase in equipment size to address market demands.

Large-sized anodizing treatment facility of Saitama Plant (The maximum treatable size: 3.0 m x 2.7 m)

Started the manufacture of magnetic-applied electronic components using pressing and heat-treatment.

We started to deliver products directly to HDD manufacturers by purchasing the Kisho Electronics Group, which had superior coil winding and resin molding technologies, to establish an integrated production system for HDD parts on which our part is mounted.

injection-molded coil products

Coil

In addition to the conventional manufacture of electronic components, we established a new manufacturing base that enabled the anodizing treatment of large-sized liquid crystal panels in South China, in anticipation of the shift of production bases of liquid crystal panels from Japan to China and Taiwan as well as a further increase in the panel size.

ZHUHAI

We entered into the market for manufacturing devices for LED that are used for lights and TV backlights. Our vacuum brazing technology enabled to form films of multiple gases at one time by forming three-dimensional steric flow passage structures.

The cross-section view of the shower plate for MOCVD devices.

Vacuum Brazing

We started to directly import tungsten carbide powder, which is the main component of carbide tools, and to sell it to carbide manufacturers to which we had been supplying cobalt powder for carbide tools.

Enlarged photograph of tungsten carbide powder

Rare Metals