Corporate Profile

Company Name



March 2005 (changed company name in March 2018 )

Fiscal Closing



298million yen

Listed Market

Tokyo Stock Exchange Growth(Securities code : 9250)


President Yoshikazu Sasaki


Ichigaya Head Office:
9F MG Ichigaya Building, 1-9 Gobancho, Chiyoda-ku, Tokyo, Japan

Yokohama Global Center:
11F JPR Yokohama Nihon Odori Bldg, 17 Nihonodori, Naka-ku, Yokohama-shi, Kanagawa, Japan

Number of Employees

130 ※ As of November, 2021.

Main Business

IT-GRC/Security Related Solutions


worker dispatching undertaking (派13-311240)

fee-charging employment placement business (13-ユ-312256


Digital Risk Association(Director)

Japan Card Data Security Consortium (Steering Committee Member)

PCI DSS AWS Users Consortium Japan (Committee Member)

Nippon CSIRT Association

Japan CISO Association



PCI DSS Qualified Security Assessor


ISMS:ISO/IEC 27001:2013・JIS Q 27001:2014

Trading Performance

  • EMC Japan Corporation
  • ITOCHU Techno-Solutions Corporation
  • NRI SecureTechnologies Ltd.
  • Clementec Co., LTD.
  • DOCOMO Systems, Inc.
  • NS Solutions Corporation
  • Layers Consulting Co., Ltd.



Board of Directors

Yoshikazu Sasaki

Born in Iwate Prefecture in 1976. After graduating from the University of Southern California, Department of Computer Science, he joined Hewlett-Packard Japan and engaged in security consulting. In March 2005, he founded Frontier X Frontier Co., Ltd (changed its name to NANAROQ Co., Ltd. in 2009 and GRCS Co., Ltd. in 2018). Becoming the president and representative director and started business in 2009 as a pioneer specializing in GRC (Governance, Risk and Compliance). Launched the security consulting business in 2013, and expanding the GRCS business globally, which is a fusion of GRC and Security.

Takuya Tsukamoto

After graduating from the University of Southern California, Department of Computer Science, Takuya joined NEC Soft (now NEC Solution Innovator) and engaged in mobile phone development. After participating in GRCS in 2009, he was in charge of consulting and product development for GRC and security business mainly in the finance, communications and manufacturing industries. Director in charge of Technology.

Ikue Tanaka

She started work at a domestic independent consulting firm. After that, she participated in the founding of AGASTA Co., Ltd. and went public. In May 2014, she became a director of GRCS. In charge of Administration Division.

Keiichi Kubo
Outside Director

After gaining experience in supporting stock listings at Tohmatsu Audit firm, he started a risk consulting business and expanded the organization from 15 to 450 people. Served as a board member of Deloitte Tohmatsu Risk Service Co., Ltd., he also participated in government committees such as the Advisory Committee for Natural Resources and Energy and the Nuclear Facility Safety Information Declaration Investigation Committee.

Osamu Yamano
Outside Director

After working at AT & T Bell Laboratories in the US, Yokogawa-Hewlett-Packard (currently HP Japan), and Autodesk, participated in the establishment of Computer Associates (currently CA Technologies). After that, he was the president of RSA Security, EMC Japan, McAfee, and the president of Akamai Technologies GK from 2019, leading the business. He is currently a visiting professor and information security advisor at the University of Electro-Communications.


Koshi Oizumi
Corporate Auditor

After graduation, joined Saitama Bank (now Resona Bank), mainly engaged in international operations. Then he served as full-time auditors such as Levi Strauss Japan and Symbio Pharmaceuticals and assumed a full time auditor at GRCS in April 2018.

Yasuo Shimada

Shino Asayama

Executive Officers

Taku Tokunaga
Executive Officer

After graduating, he worked as a security consultant at Hewlett-Packard Japan. Contributed to the top market share by consulting on domestically developed security products, planning products, and formulating strategies. After that, he joined GRCS in 2016 and assumed responsibility for product and solution planning and development.

Atsushi Mochizuki
Executive Officer

Joined DEC Japan as a new graduate and was responsible for NW software product development. Then, he worked as a security consultant in pre-sales, system development, and PM as a security consultant. Previously, he was the head of the Security Division at Hewlett-Packard Japan, where he oversaw the security business pre-sales and service departments. Participated in GRCS in May 2018.

Yohei Kawajiri
Executive Officer

After graduating, joined Nomura Securities Investment Banking. He engaged in IPO of unlisted companies and M&A of PE funds. After that, he worked as General Manager and CFO of Media Management Company and joined the GRCS in December 2017.

General Counsel

Yoshihiro Takatori

Graduated from Harvard Law School (LL.M.). Registered as a lawyer in Japan and New York State. British Arbitrator Association (CIArb.) Given Senior Arbitrator (FCIArb.). Managing Director of Japan Arbitrators Association (JAA), Co-representative of British Arbitrators Association Japan Chapter.
As one of Japan's few experienced arbitration and mediation lawyers, he belongs to Kasumigaseki International Law Office International Arbitration Chambers, after serving as managing and representative roles of Japan practices at the global firms such as Paul Hastings and Orrick.
Mainly handles international lawsuits and arbitrations such as civil, commercial, intellectual property rights, product liability, antitrust laws, etc., which cover multiple jurisdictions, FCPA, cyber security compliance cases, labor law related disputes including whistleblowing, etc. He has been selected as the only Japanese lawyer among the top 10 lawyers in Asia Pacific (Innovative Lawyers) by the Financial Times.

Note: General Counsel is not responsible for quality checks and content assurance of our products or systems.


9F MG Ichigaya Building,
1-9 Gobancho, Chiyoda-ku,
Tokyo, Japan