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  3. NITTOSEIKO CO., LTD.
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NITTOSEIKO CO., LTD.

EstablishmentFebruary 25, 1938
capital352200Ten thousand
number of employees1912
addressKanagawa/Kohoku-ku, Yokohama-shi/3-9-18 Shin-Yokohama, Shin-Yokohama TECH Building A, 5th Floor
phone045-620-5361
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last updated:Jul 29, 2025
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NITTOSEIKO CO., LTD. Product Lineup

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screw screw
Screw tightening machine Screw tightening machine
Rivet and eyelet fastening machine Rivet and eyelet fastening machine
Measuring and testing equipment Measuring and testing equipment
Cleaner Cleaner
地盤調査機 地盤調査機
Shinwa Seiko Co., Ltd. Shinwa Seiko Co., Ltd.
Shinwa

Shinwa Seiko Co., Ltd.

Shinwa Seiko is a select group of skilled technicians specializing in precision machining, recognized as one of the best in the prefecture. We provide a wide range of manufacturing technologies based on mold manufacturing techniques that serve as the foundation for high-precision products, accommodating precision and unit costs that are often avoided by other companies in the same industry. Available 24/7, we respond to customer demands, serving as a "last resort" in the press processing industry that makes the impossible possible. We continuously evolve our technical skills, management capabilities, and human resources, not only meeting high-level requests that break conventional wisdom but also proposing and creating even higher added value through proactive manufacturing. Particularly in complex processing, we have received recognition for our top-class manufacturing technology nationwide. Leveraging Shinwa Seiko's mold manufacturing technology, material knowledge, and expertise in parts production, we can contribute to cost reduction during the customer’s parts design and prototyping stages. Additionally, we actively challenge ourselves in production technology and product development, collaborating with universities and research institutions to develop new materials and technologies. ★             ★ [Shinwa Seiko Co., Ltd. Website] https://www.shinwaseiko.co.jp/ ★             ★

Precision forged parts

Integrated forged parts born from experience.

- Fusion of forging technology and SV technology - Composite processing within progressive dies - Free processing of material reduction and thickness variation - Cost reduction in method conversion - Production of various forged parts - VE proposal methods (Cutting processing → Press processing) (Die casting → Press processing) - Integration born from experience; we will challenge ourselves with "if we do VE, we can do it" ★                                        ★ *If you have any questions or inquiries about our products, please feel free to contact us at the information below.* 【Contact Information】 Shinwa Seiko Co., Ltd. Sales Department  (Representative) TEL: 0265-79-8546   E-mail: mail@shinwaseiko.co.jp ★                                        ★

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Micro components and contact parts

Micro-machined components produced by high-precision mold technology.

- Mass production of high-precision requirement products - Pressing of difficult-to-process special shapes - Products with gap processing shapes below plate thickness - Production of plating materials, spring materials, and various types of materials is possible - Recovery of individual products and strips is possible ★                                        ★ If you have any questions or inquiries about our products, please feel free to contact us at the information below. 【Contact Information】 Shinwa Seiko Co., Ltd. Sales Department  (Representative) TEL: 0265-79-8546   E-mail: mail@shinwaseiko.co.jp ★                                        ★

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Precision die-casting parts

Difficult-to-process selected composite progressive die.

- Production possible from small to large quantities - Precision cutting parts can be achieved through pressing - 3D shapes can also be realized with pressing methods - Proven results with various materials - Proposals available for round, square, and irregular shapes ★                                        ★ If you have any questions or inquiries about our products, please feel free to contact us at the information below. 【Contact Information】 Shinwa Seiko Co., Ltd. Sales Department  (Representative) TEL: 0265-79-8546   E-mail: mail@shinwaseiko.co.jp ★                                        ★

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Terminal components

Mold patterns tailored to customer requirements.

- Confident in terminal shape - Capable of press processing considering insert molding - Processable even with complex shapes - Uniform shape for multiple terminals - Consistent proposal for press processing + plating (partial plating, stripe plating, etc.) ★                                        ★ *If you have any questions or inquiries about our products, please feel free to contact us at the information below.* 【Contact Information】 Shinwa Seiko Co., Ltd. Sales Department  (Representative) TEL: 0265-79-8546   E-mail: mail@shinwaseiko.co.jp ★                                        ★

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Thin parts

Products with almost no burrs are possible even from a plate thickness of 0.01mm.

- Production results of various thin plates available - Different plate thicknesses can be handled with a single mold - Versatile and cost-effective - VE proposal construction method (Etching → Press processing) ★ If you have any questions or inquiries about our products, please feel free to contact us at the information below. 【Contact Information】 Shinwa Seiko Co., Ltd. Sales Department (Main) TEL: 0265-79-8546 E-mail: mail@shinwaseiko.co.jp ★

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Mold making

High-precision wire cutting and high-precision molds created by exceptional engineers.

- Achievements with irregular materials and special materials - Joint consideration possible from the early design stage - Proposals based on experience - Capability to set up progressive processes according to required precision ★                                        ★ If you have any questions or inquiries about our products, please feel free to contact us at the information below. 【Contact Information】 Shinwa Seiko Co., Ltd. Sales Department  (Representative) TEL: 0265-79-8546   E-mail: mail@shinwaseiko.co.jp ★                                        ★

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Development project

Realization of benefits through pressurization.

- Cost reduction through press processing - Achieving stable quality - Ensuring delivery quantities - Proposals for composite processing such as forging and drawing - Setting processes according to specifications and applications ★                                        ★ If you have any questions or inquiries about our products, please feel free to contact us at the information below. 【Contact Information】 Shinwa Seiko Co., Ltd. Sales Department  (Representative) TEL: 0265-79-8546   E-mail: mail@shinwaseiko.co.jp ★                                        ★

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Ultra-small components and contact parts for medical devices

High-precision molds and press technology enable the precision control of medical devices supported by micro-machined components.

The medical device industry demands miniaturization and high-precision control. In particular, the reliability of small components is crucial to ensure patient safety and accurate diagnosis and treatment. Poor contact or dimensional errors can lead to malfunction or performance degradation of the equipment. Our ultra-small and contact components support the precise control of medical devices through high-precision molding and pressing technology. 【Application Scenarios】 - Endoscopes - Surgical robots - Analytical devices - Various sensors 【Benefits of Implementation】 - Contributes to miniaturization and weight reduction - High reliability and durability - Achieves precise motion control - Enhances the performance of medical devices

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Ultra-small components and contact parts for automobiles

High-precision mold and press technology enables the miniaturization of automotive parts.

In the automotive industry, the miniaturization of components is essential for weight reduction, space-saving, and improving fuel efficiency. Particularly with the increase in onboard electronic devices, the miniaturization of contact components has become an important challenge to enhance design flexibility and improve product reliability. Our ultra-small and contact components meet these challenges through high-precision molding and pressing technology. 【Application Scenarios】 - Onboard electronic devices - Miniature sensors - Connectors 【Benefits of Implementation】 - Space-saving through component miniaturization - Improved fuel efficiency through weight reduction - Enhanced product reliability through high-precision processing

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Aerospace ultra-small components and contact parts

High-precision molds and press technology enable the production of micro-machined parts for aerospace applications.

In the aerospace industry, reducing the weight of aircraft is essential for improving fuel efficiency and, consequently, reducing operational costs. The lightweighting of components is a crucial factor in decreasing the overall weight of the aircraft. High-precision microfabrication technology enables the production of lightweight yet high-strength parts, contributing to the enhancement of aircraft performance. Our ultra-small and connector components have been developed to meet the lightweighting needs of the aerospace sector. 【Application Scenarios】 - Aircraft electronic devices - Spacecraft control systems - Satellite communication equipment 【Benefits of Implementation】 - Improved aircraft performance through lightweight components - Increased reliability through high-precision processing - Enhanced design flexibility by accommodating various materials

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Ultra-small components and contact parts for smartphones

Realizing miniaturization and high performance of smartphones with high-precision mold and press technology.

In the smartphone industry, miniaturization and high functionality are always in demand. As high-density mounting progresses, the miniaturization and high precision of contact components are crucial factors that influence the reliability and performance of products. Contact failures can lead to product malfunctions and reduced lifespan. Our ultra-small and contact components address these challenges through high-precision molding and pressing technology. 【Application Scenarios】 - Component mounting in the narrow spaces inside smartphones - Ensuring contacts on high-density mounting boards - Smartphones that require miniaturization and lightweight design 【Benefits of Implementation】 - Contributes to the miniaturization and lightweight design of products - Achieves high reliability and durability - Improves design flexibility by accommodating various materials

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Ultra-small components and contact parts for wearable devices

Contributing to the miniaturization and energy efficiency of wearable devices.

In the wearable device industry, miniaturization and power saving are important challenges. To extend the battery life of devices and achieve a more comfortable wearing experience, it is essential to reduce the size of components and power consumption. Our ultra-small and contact components provide small and precise parts through high-precision molding and pressing technology, contributing to the power saving of wearable devices. 【Usage Scenarios】 - Smartwatches - Smart glasses - Healthcare devices 【Effects of Implementation】 - Miniaturization of devices - Extension of battery life through power saving - Improvement of product reliability

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Ultra-small components and contact parts for robotics

High-precision molds and press technology enable the manufacturing of micro-machined components in the robotics field.

In the robotics industry, miniaturization and high precision are advancing, and as a result, the quality of micro-machined components such as contact parts has become important. In particular, components that directly affect the operational accuracy and durability of robots require high precision and reliability. Inappropriate parts can lead to malfunctions or failures of the robot. Our ultra-small and contact parts solve these challenges through high-precision mold and press technology. 【Application Scenarios】 - Precision equipment - Electronic devices - Various sensors 【Benefits of Implementation】 - Supply of high-precision parts - Miniaturization and lightweighting of products - Achievement of high reliability

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Ultra-small components and contact parts for game consoles

Parts that support the miniaturization and high performance of game consoles, realized by high-precision mold and press technology.

In the gaming console industry, there is a demand for both miniaturization and high performance. In particular, components that can provide high durability and accurate signal transmission within limited space are essential. Poor contact or malfunctioning parts can lead to decreased performance or failure of the gaming console. Our ultra-small and contact components address these challenges through high-precision molding and pressing technology. 【Usage Scenarios】 - Inside gaming consoles where high-density mounting is required - When aiming for miniaturization and lightweight design - Areas where high durability and reliability are needed 【Benefits of Implementation】 - Contributes to the miniaturization and high performance of gaming consoles - Reduces the risk of poor contact - Improves product reliability

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Ultra-small components and contact parts for security systems

High-precision molds and press technology enable the reliable micro-machined components that support security system reliability.

In the security system industry, the stable operation of systems and long-term reliability are the most important issues. In particular, malfunctions or failures can lead to serious situations such as information leaks or system outages. Our ultra-small components and contact parts are manufactured using high-precision mold technology, ensuring stable performance even in harsh environments. This contributes to the improvement of reliability in security systems. 【Usage Scenarios】 - Surveillance cameras - Access control systems - Security gates - Various sensors 【Benefits of Implementation】 - Reduced risk of system malfunctions - Achieving long-term stable operation - Lower maintenance costs - Gaining customer trust

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Ultra-small components and contact parts for communication infrastructure

High-precision mold and press technology supports the acceleration of communication infrastructure.

In the telecommunications infrastructure industry, there is a constant demand for faster data transmission. Particularly with the spread of next-generation communication standards like 5G, compact and high-performance components are essential. The quality of connector components directly affects communication speed and stability, making high-precision products crucial. Our ultra-small and connector components contribute to the acceleration of telecommunications infrastructure through high-precision molding and pressing technology. 【Application Scenarios】 * Base stations * Data centers * Optical fiber communication equipment 【Benefits of Implementation】 * Realization of high-speed data communication * Miniaturization of equipment * Ensuring high reliability

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Ultra-small and contact parts for industrial machinery

High-precision mold and press technology achieves improved durability of industrial machinery.

In the industrial machinery industry, components that can withstand long-term operation in harsh environments are required. In particular, parts exposed to vibrations, temperature changes, and wear must possess high durability and reliability. Improper selection of components can lead to machine failures or performance degradation, potentially resulting in decreased production efficiency. Our ultra-small and contact components, produced using high-precision molding and pressing technology, offer durable products that contribute to the stable operation of industrial machinery. 【Usage Scenarios】 - Use in harsh environments - Areas with high vibrations and shocks - Locations requiring stable operation over long periods 【Benefits of Implementation】 - Improved machine operating rates - Reduced maintenance costs - Extended product lifespan

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