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  1. Home
  2. Machine elements and parts
  3. 日本ピストンリング
Machine elements and parts
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日本ピストンリング

EstablishmentDecember 20, 1934
capital983900Ten thousand
number of employees2578
addressSaitama/Chuo-ku, Saitama-shi/5-12-10 Honmachi East
phone048-856-5033
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last updated:Aug 04, 2025
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  • Products/Services(55)
  • catalog(55)
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日本ピストンリング Company Profile

Towards world-class high quality! The "NPR" brand chosen by the world's high-performance engines.

Our group is engaged in the manufacturing and sales of automotive-related products (piston rings, valve seats, and other automotive-related products) as well as marine and other products, along with related businesses. Our products are adopted in various types of engines, backed by reliable technology and a rich lineup of quality. In addition to automotive and marine products, we also handle MIM (Metal Injection Molding) parts that can achieve small and complex shapes, axial gap motors optimal for AGVs, motor cores (powdered magnetic cores), highly biocompatible titanium alloys (NiFreeT), and medical device components (dental implants).

Business Activities

The group is engaged in the manufacturing and sales of automotive-related products (piston rings, valve seats, and other automotive-related products) as well as marine and other products, along with related businesses.

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Products/Services (55)

Low-speed, high-torque type e-Axle [Space-saving with in-wheel design] product image
Low-speed, high-torque type e-Axle [Space-saving with in-wheel design]
Direct Drive Motor [Low Speed, High Torque] product image
Direct Drive Motor [Low Speed, High Torque]
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Reduce material waste! SDGs-compliant metal processing method: [MIM] product image
Reduce material waste! SDGs-compliant metal processing method: [MIM]

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catalog(55)

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Low-speed high-torque e-Axle

Low-speed high-torque e-Axle

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Case studies

Case studies

OTHER
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Introduction materials for the powder compact core axial gap motor.

Introduction materials for the powder compact core axial gap motor.

TECHNICAL
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Japan Robot Week 2024 MIM Manufacturing Method Exhibition Panel

Japan Robot Week 2024 MIM Manufacturing Method Exhibition Panel

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news(1)

2021-11-12_09h15_00.png

Announcement of the commencement of technical discussions with Sophia University regarding our titanium alloy.

  • PRODUCT

We are pleased to announce that we have commenced joint technical discussions with Professor Noriyuki Kusamori and his laboratory from the Department of Functional Materials Science at Sophia University, who specialize in biomaterials for advanced medical technologies, regarding our medical new material titanium-tantalum alloy 'NiFreeT.' This collaboration will build upon our previous fundamental research and focus on specific projects. The aim of this research is to apply our product to orthopedic medical devices, leveraging its properties to reduce the burden on bones during implantation in the body. In the future, we are also planning to establish collaborations and joint research with hospital personnel and clinical researchers. **Features of NiFreeT:** - Low Young's modulus - High elastic limit (returns easily after deformation) - Non-magnetic (usable under MRI) - Good X-ray visibility - Nickel-free (allergy prevention) - High biocompatibility (suitable for medical devices requiring long-term implantation) *For more details, please refer to the related catalog or feel free to contact us.*

Nov 12, 2021

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Detailed information

Company name 日本ピストンリング
number of employees2578
Contact addresspostalcode 338-8503 Saitama/ Chuo-ku, Saitama-shi/ 5-12-10 Honmachi EastView on map TEL:048-856-5033 FAX:048-856-5037
Key Partners◆(In alphabetical order) Domestic Automotive Industry Isuzu Motors Ltd. / Kawasaki Heavy Industries Ltd. / Suzuki Motor Corporation / Subaru Corporation / Daihatsu Motor Co., Ltd. / Toyota Motor Corporation / Nissan Motor Co., Ltd. / Hino Motors, Ltd. / Honda Motor Co., Ltd. / Mazda Motor Corporation / Mitsubishi Motors Corporation / Mitsubishi Fuso Truck and Bus Corporation / Yamaha Motor Co., Ltd. / UD Trucks Corporation Overseas Automotive Industry Audi AG / General Motors Company / Daimler AG / Harley-Davidson, Inc. / Hyundai Motor Company / Ford Motor Company / Volkswagen AG Domestic Marine and Other Akasaki Iron Works Co., Ltd. / Iseki & Co., Ltd. / Kubota Corporation / Komatsu Ltd. / Japan Engine Corporation / Hanshin Internal Combustion Engine Works, Ltd. / Hitachi Zosen Corporation / Mitsui E&S Shipbuilding Co., Ltd. Overseas Marine and Other Wärtsilä Ltd. / Hyundai Heavy Industries Co., Ltd. / MAN Energy Solutions
Industry Machine elements and parts
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