Tosei Systems Co., Ltd.

Company Overview

  • Date of establishment: October 1, 1985
  • Headquarters: Within Tokyo Seimitsu Plant, 2968-2, Ishikawa-machi, Hachioji-shi, Tokyo
  • President: Koichi Kawamura
  • Sales: 2,269 million yen (FY2018)
  • Employees: 119 (as of March 31, 2019)
  • Operations: 2 in Japan, 0 overseas

Business Overview

Tosei Systems is a wholly-owned subsidiary that supports product development of Tokyo Seimitsu in the field of software. The company is responsible for development of embedded software for control and measurement functions of Tokyo Seimitsu's semiconductor manufacturing equipment and measuring instruments and Windows applications attached to the equipment. In the replacement of the core system (ERP) of Tokyo Seimitsu, which took place in the last several years, a series of operations for requirement analysis, development and operation support were undertaken by the company.
The company is focused on the operations relating to the core system, as it is expected by Tokyo Seimitsu to expand the scope of work to undertake. As the company is engaged in the development of a wide range of software, such as embedded software, Windows applications and core systems, new graduate and mid-career recruitment is carried out considering the candidates' aptitude for software development regardless of gender or university faculty.
The company has so far held 18 semiannual improvement suggestion presentation meetings, attended by all employees.
By attending this meeting to report the outcome of daily work and present examples of new technology introduction, employees proactively exchange information.


With regard to the ISO27001 (Information Security) certification, the section in charge of government-related work was certified in the first year, the administration department was certified in the second year, and in the third year, which is this year, the section in charge of core operations are aiming to acquire the certification. As the acquisition of ISO27001 certification is important in executing core operations, members of this section are working hard every day for the certification.


Our internship for students offers a basic program of embedded software, using an educational drone, to operate something and to do other things and is well-received by students.