Tohshin Seiki Corporation

Examples of using rollers

The world's only manufacturer specializing in rollers

Examples of using rollers

Bearing rollers may look small but they have over 50 years of engineering packed into them. Tohshin Seiki holds an approximately 80 percent share nationwide when it comes to certain types of rollers. Our pursuit for achieving sub-micron levels of precision as well as honing our craft have allowed us to maintain our relationships with major manufacturers as technology partners.

Launching as a specialized manufacturer

Aiming to become a company with its own technological capabilities, Tohshin Seiki was born in December of 1956. Taking into consideration managerial elements such as capital, future potential, labor productivity of added value and locality, Tohshin Seiki began manufacturing rollers for bearings. Bearings are used mostly in cars but even computers use extremely small bearings, and thus bearings have become an essential part of today’s society.

Applications of rollers

Tohshin Seiki’s value of presence

Toshin quality

“It is meaningless to exist unless we can become a company that can create a dialogue with customers, rather than positioning ourselves as a subsidiary of major manufacturers.” This has been the thought since the company’s inception. That’s why we hold ourselves to much more severe standards than those outlined in the JIS, so that we can provide for and satisfy our customers with the high precision rollers.

Our commitment to sub-micron precision

“We’ll only make the same products as our competitors if we use the same manufacturing methods,” was the thought process that led to us to develop our own in-house central production facility. Other auxiliary materials like the grinding stone, are used in unique ways that match our processing techniques.
Our “obsession” with sub-micron levels (1/10,000mm) has been ingrained into our corporate culture, and it is thanks to every employee for having the obsession when manufacturing that Tohshin Seiki is the way it is today.

Our commitment to sub-micron precision1

Our commitment to sub-micron precision2

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Overview (As of 2023)

Location 〒923-1121 Ishikawa Prefecture, Nomi City, Terai-machi Ha 18
Date of Establishment December 1956
Capital 73 million yen
Number of employees 521(61 women)
Description of business Variety of rollers for bearings, precision pins and shafts
Revenue 9,210 million yen
Plant Main Plant, Ao No.1 plant, Ao No.2 plant
Land size 32.600m²・4.200m²・38.000m²
Building surface 18.600m²・3.000m²・18.600m²
characteristics The only specialized roller manufacturer

Appearance of Tohshin Seiki Corporation