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Nitto Industry Co., Ltd.


Shinichiro Komatsu (Mr.)
Year established
100,000,000 yen
1,400,000,000 yen
Postal (zip) code
Company address
1-4-41 Nishi, Kawajiri-cho, Kure-shi,
Company PR
More than 60 years since our founding in 1939, we have continued to supply casting products, mainly small parts for engine, to major assembly companies. Our company performs integrated production system, from producing materials to machining and to heat treatment. The Nitto brand tappets have been highly rated for its reliability by the industry. Another base of our business is air cocks and air valves that are used in brakes for trains. Our products in this category also control a high share of the market.
The advantages of Nitto casting system are follows:
(1) Our shell mold method delivers high dimensional accuracy and makes products with smooth surfaces.
(2) Our chilled casting technology yields superior corrosion resistance and wear resistance.
(3) Our casting system takes advantage especially with comparatively small sizes.
Feel free to contact us with any inquiries.

Engine parts: tappets

Parts of Brakes for trains: air cocks

Major Products
Chilled casting tappets for diesel engines
Copper alloy (air cocks and air valves used in brakes for trains, and other parts)
Other small casting products made by shell molding with chilling technology
Major Customers
Mazda Motor Corp.
Mitsubishi Heavy Industries, Ltd.
Yanmar Co., Ltd.
IHI Shibaura Machinery Corporation
Komatsu Ltd.
Major Facilities/Equipment
High-frequency electric furnace 2
 200 kg, 300 kg
Shell molding machine 10
 500 × 500 mm, 400 × 400 mm blow type, 600 × 500 mm dump type
Machining center 32
 Vertical type: 600 × 350 cm, 1,000 × 550 cm; horizontal type: 500 × 500 cm
Grinding machine 8
 Surface grinding machine: 800 × 400 cm, centerless grinding machine: maximum machining diameter 60 mm
Heat treatment equipment 4
 Annealing, normalizing, and tempering furnaces
Technology Employed
Production machinery/equipment manufacturing industry
Excels in alloys of special components including cast iron and cast steel. Best in small products of 0.1 - 10 kg in weight.
Production machinery/equipment manufacturing industry
Can produce smooth surface and precise dimensions. Particularly effective in the more complex items that are produced with cores.
Production machinery/equipment manufacturing industry
Has been supplying, wear-resistant parts made by our chilling technology to automakers for many years.
Production machinery/equipment manufacturing industry
Handles various types of heat treatment via heat treatment furnaces.
Production machinery/equipment manufacturing industry
Has been carrying out precision punching and grinding of difficult-to-cut materials for automakers and bearing manufacturers.
Production machinery/equipment manufacturing industry
Carries out consistent managed quality control through our all manufacturing process.
Primary Area of Technical Expertise

More than 60 years experience as a manufacturer of chilled casting tappets for diesel engines and cocks, valves for trains’ brakes. In addition to these our major products, we are also engaged in pioneering fields where we can apply our signature chilled casting technology.

Future Business Challenges
Small casting products by shell molding
Copper alloy casting products
Developing new products where we can apply chilled casting technology
Development of new materials
Future Technical Challenges
Production machinery/equipment manufacturing industry
Casting of stainless steel, alloys of special components, new materials, etc.
Production machinery/equipment manufacturing industry
Handling of small-lot, multi-item production using self-hardening molds.
Production machinery/equipment manufacturing industry
Machining of special metals, new materials, in addition to the casting products mentioned above.

In 1995 established a joint venture in Handan in China, allowing large-scale cost reductions for casting products, ductile iron products. This joint venture is continuing to deliver products to major Japanese manufacturers. Please contact us if you are considering how to reduce costs for casting products.

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