About Us

Corporate Philosophy

SIIX Principles

Siix シークス

Provide the best merit for business through the best business organizing.


Corporate Theme

The Corporate Theme is the SIIX business concept.


We contribute to the activation of the social system and the progress of humankind by pursuit of the effective use of the world’s resources.


Corporate Mission

The Corporate Mission is the mission SIIX should try to achieve in terms of society.


We will become a company that organizes customer needs in all fields around the world to give all stakeholders a sense of affinity and charm as a “global business organizer” that creates business.


Corporate Target

The Corporate Target is the vision of an extremely high level corporation which we strive to be.

1st Filter

Challenging, Speedy and Fair

2nd Filter

Sophisticated, Creative and Simple


Corporate Style

The Corporate Style is what our company should always consider very important as to how we should be as a corporation.


Message from Management

Shiro Murai

Koji Yanase

We care spirit

The 21st Century foists us into the midst of drastic change. For brand-new business model and sense of value, company is necessitated to struggle for survival beyond the bounds of businesses of all types and scales, systems, and regions. At SIIX Corp., we have grown together with global change and fierce competition since 1957, including the period when we were part of Sakata Inx International Division. However, not all has changed: there are tenets we hold true and intend to maintain in the future.

One is our unique concept of “zero”. By “zero” we mean an insatiable desire and constant readiness to take up challenges, a belief that being empty-handed does not mean being incapable of action. Another is the sense of relationship with the many people who have supported SIIX until now. The concept of zero and this emphasis on relationships remain our most important driving forces for business expansion. SIIX reaffirms its commitment to upholding this company philosophy while working to digest and apply the latest trends at the forefront of these ever-changing times.

In the electronics industry, Electronics Manufacturing Services (EMS) are emerging as the focus of attention because of the increasing need for outsourcing deriving from the progressing shift toward horizontal business divisions as opposed to a system where a single manufacturer produces all. SIIX has established a worldwide network to manage parts procurement, assembling, manufacturing and logistics. We provide integrated EMS services from up-stream to down-stream. One of our vital challenges is how to satisfy customers’ requests for cost savings, shorter lead-time from R&D to mass-production as well as business efficiency. SIIX offers a platform providing partial or total business solutions. At SIIX, we care.

President Koji Yanase

Chairman Shiro Murai


Company Name
SIIX Corporation
Date of incorporation
July 1, 1992
Chairman: Shiro Murai
President: Koji Yanase

Osaka Headquarters

SIIX BLDG. 1-4-9, Bingo-machi, Chuo-ku, Osaka 541-0051, JAPAN map
TEL: +81-6-6266-6400

Tokyo Headquarters

SIIX BLDG. 2-3-25, Kudan-Minami, Chiyoda-ku, Tokyo 102-0074, JAPAN map
TEL: +81-3-3238-7000

Nagoya Sales Department

SIIX BLDG. 3-2-11, Meieki, Nakamura-ku, Nagoya, Aichi 450-0002, JAPAN map
TEL: +81-52-898-8318

¥2,144 million (FY2023)
Net sales
¥309,768 million (FY2023: consolidated)
Number of employees
Non consolidated: 214 / Consolidated: 11,052(as of December 31, 2023)
Stock exchange listing
Prime Market of Tokyo Stock Exchange
Local Code
Bank References
Sumitomo Mitsui Banking Corporation, MUFG Bank, Ltd., Resona Bank, Ltd., Mizuho Bank, Ltd.
Fiscal Period
December 31
Main Shareholders
Sakata Inx Corporation
The Master Trust Bank of Japan, Ltd. (Trust account)
SIIX Corporation
Forty Six Ltd.
Resona Bank, Ltd.
Sumitomo Mitsui Banking Corporation
Custody Bank of Japan, Ltd.(Trust account)
Shiro Murai
Custody Bank of Japan, Ltd.(Trust account 4)
MUFG Bank, Ltd.
(As of December 31, 2023)
ISO9001ISO14001ISO / IEC 27001




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