Profile of Tokyo Seimitsu

With semiconductor manufacturing equipment and precision measuring instruments as the pillars of its business, Tokyo Seimitsu conducts business activities globally, mainly in Asia but also in other parts of the world including Europe and the Americas. We aim to create the world's No.1 products and continue to grow with our partners and customers by integrating the excellent wisdom and information available in the world.


Company name:
 Tokyo Seimitsu Co., Ltd.
Head office:
 2968-2, Ishikawa-machi, Hachioji-shi, Tokyo
 March 28, 1949
 Hitoshi Yoshida
Paid-in capital:
 10,374 million yen (as of March 31, 2016)
Exchange listing:
 Tokyo Stock Exchange 1st Section
Sales amount (consolidated):
 70,274 million yen (as of March 31, 2016)
Ordinary profit (consolidated):
 13,232 million yen (as of March 31, 2016)
Number of employees (consolidated):
 1,559 (as of March 31, 2016)
Operation sites:
 Hachioji Plant, Tsuchiura Plant, and 17 sales
 offices in Japan, 66 overseas offices, 5
 domestic group companies, etc.

Financial Data (Consolidated)

Business Summary

Tokyo Seimitsu conducts business activities with semiconductor manufacturing equipment and precision measuring instruments as the pillars of its business. Semiconductors are indispensable for all kinds of equipment that support the convenient, comfortable society, such as smartphones, automobiles, and airplanes. They constitute a business area where we can contribute to addressing social needs for functional enhancements, such as making devices smaller and more efficient, and reduction in environmental impact. We meet these social needs through the business activities we conduct in the semiconductor market that is expected to keep growing thanks to IoT and other innovations.
Precision measuring instruments support manufacturing by providing advanced measuring capabilities that are needed in various stages of the production line. Based on the concept of "What cannot be measured cannot be produced," we intend to continue to leverage our excellent technical prowess and support manufacturing and society with our measuring technology.


Semiconductor Manufacturing Equipment

Probing machines
A probing machine tests the electric characteristics of each semiconductor chip created on a wafer. The test is carried out with the machine connected to a semiconductor tester via a probe card.

Dicing machines
A dicing machine cuts a large number of semiconductor chips created on a wafer into individual chips.

Precision Measuring Instruments

3D coordinate measuring machines
A 3D coordinate measuring machine has a scale in an orthogonal coordinate system to read the positional relationship of the measured object and the probe as X, Y and Z coordinates.
These measurements are used to evaluate dimensions, positions, shapes, geometric deviations, etc.

Surface texture and contour measuring instruments
A surface texture and contour measuring instrument quantitatively measures the smoothness or unevenness of the surface of a machined object. Measurements are evaluated using roughness parameters determined by JIS and ISO standards.

Roundness and cylindrical profile measuring instruments
A roundness measuring instrument generally evaluates round or circular objects, determining the degree of deviation from a geometrically perfect circle.