Corporate profile

Corporate profile

Company name

Toho Koki Seisakusho Co., Ltd.


38 Kogane-cho, Yokkaichi City, Mie Prefecture 512-8062




Eisuke Suzuki


Manufacture and sale of next generation semi-conductor substrate planarization machines (CARE equipment)

CMP (Chemical Mechanical Polishing) pads business, Machining of large machine parts

Business hours

8:20~17:00(Japan time


Saturday, Sunday, Holidays


80 million yen


‘July 3, 1956



Built factory in Oinokawa, Yokkaichi City. Started design, manufacture and installation of chemical machinery.


Joined the Yokkaichi Machinery and Metalworking Industrial Complex Cooperative Association and built the factory that is currently our head office.


Increased capital to 50 million yen. Began full-scale introduction of numerical-control (NC) machine tools.


Established Toho Engineering Co., Ltd. Entered semiconductor field.


Launched sales of the CMP series of CMP pad groove processing machines.


Began collaborative research on CMP pads with Professor Doi of Saitama University.


Invested in Araca Incorporated (a U.S. company). Launched CMP services business.


Collaborative research on TSV-CMP with Professor Chen of the National Taiwan University of Science and Technology


Participated in research into the CARE method invented by Professor Kazuto Yamauchi and Assistant Professor Yasuhisa Sano at Osaka University.


Launched the Saisei Eco-Cap® for attaching and detaching abrasive pads


Selected by the Ministry of Economy, Trade and Industry (METI) under their innovation hub location project. (Development of equipment for the evaluation of polishing pads for the CARE method)

Conducted joint research with the Technology Research Institute (CEA-Leti) at the French Alternative Energies and Atomic Energy Commission (CEA) on polishing pad regeneration technology.


Selected for the Strategic Core Technology Advancement Project (Development of basic technologies for the CARE method)


Launched sales of the INS series of pad groove inspection devices。


Selected by the New Energy and Industrial Technology Development Organization (NEDO) for its project to promote cooperation in the creation of innovative manufacturing industries (Development of CARE method elemental technologies for commercialization.)


Delivered the first experimental device CARE-TEC® to Nagoya University
Selected for the Strategic Core Technology Advancement Project (development of applied technology for CARE)
Started collaborative development on the AIN template with Dr. Hideto Miyake, Professor at Mie University.


Selected for the Strategic Core Technology Advancement Project (development of AIN template), Toho Koki absorbs Toho Engineering in a merger.

Increased capital to 80 million yen.


Completed construction of a new clean room (450 m2) for semiconductor substrate production


By car

Exit at Yokkaichi Higashi IC on the Higashi-Meihan Expressway and turn right at the first traffic light, turn left at the fourth traffic light, turn left at the third traffic light on the Hokusei Bypass, cross the Hironaga Bridge to Kogane-cho.

By train

From Tomida Station on the Kintetsu-Nagoya Line go to Tomida Station of the Sangi Railway Line, take a train bound for Hobo or Nishi Fujiwara and get off at Oyachi Station. It is a 15-minute walk from the station.

By taxi

Take a taxi from Tomida Station on the Kintetsu-Nagoya Line.

Greetings from the President

Eisuke Suzuki

Toho Koki Seisakusho contributes to society through the development of new markets for our innovative products. The shift to electric vehicles (EVs) is currently attracting a lot of attention, and semiconductors that efficiently convert electricity are critical.

Our company provides a solution to this issue through our extreme planarization technology for next-generation semiconductor substrates.

We have delivered our first experimental device to Nagoya University and aim to further promote the utilization of this technology through collaboration with other corporations.