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Atsumi & Sakai

Kiyoshi Yasutomi

Kiyoshi Yasutomi



  • IP&IT
  • Regulation and Compliance

WSG Practice Industries


- Committee member, Citizen Judge System Enforcement Promotion Center
- The Association for the Study of Security Science
- Chairman, NPO Institute of Digital Forensics
- Refugee Examination Counselor
- Round-table chairman, Matters Relating to Anti-Money Laundering Measures (National Police Agency)
- Council of Experts, Countermeasures Against Cyber Attacks (The Center for Financial Industry Information Systems)
- Board member, The Japan Road Traffic Information Center
- Councilor, The Center for Financial Industry Information Systems
- Academic advisor, the Asia Crime Prevention Foundation- Special adviser (former president), The Association of Certified Fraud Examiners (ACFE Japan)
- Development Committee Member, Basic Policy of Information Security (2nd Edition) of the National Center of Incident Readiness and Strategy for Cybersecurity
- Member, Kawasaki City, Administrative Appeals Review Board
- Chairman, Kamakura City, Information Disclosure Administration Council and Examination Board
- Chairman, Fujisawa City, Information Disclosure Administration Council
- Member, Personal Information Protection Commission and the IT Strategic Headquarters, the Prime Minister of Japan and Cabinet

Bar Admissions

Japan (1993)


Keio University (LL.B., 1974)
Keio Law School, coursework completed without degree (1979)
Keio University (Ph.D. in Law, 1990)
Areas of Practice

IP&IT | Regulation and Compliance

Professional Career

Professional Activities and Experience

Assistant Professor, Keio University (1981-1985)
Associate Professor, Keio University (1985-1990)
Professor, Keio University (1990-2014)
Visiting scholar, University of Michigan (1979-1980)
Visiting scholar, University of California, Berkley (1980-1981)
Visiting scholar, Faculty of Law, Thammasat University (1988)
Yamada Ozaki Law Office (1993-May 2017)
Professor emeritus, Keio University
Visiting professor and director, Legal Education Center, Kyoto Sangyo University Graduate School of Law

- "Useful Science Knowledge for Attorney Services (Series No. 5): Digital Forensics," Jiyu to Seigi (Liberty & Justice) Vol.69 No.9, the Japan Federation of Bar Associations (2018)
- "Research Study on Recent Trends of Data Protection Acts in Other Countries,h Personal Information Protection Commission (2018) [Co-author]
- "Cybersecurity and Criminal Law," NBL No.1106, Shojihomu (September, 2017)
- Safety and Law in Cyberspace, Sandai law review Vol.50 No.3 & 4 (2017)
- Regarding Article 17 of the Medical Practitioners Act: Life-Saving Emergency Training by Dentists and “Medical Activities, Sandai law review Vol.49 No.4 (2016)
- "Digital Forensics and Evidence in Criminal Cases," Sandai law review Vol.49 No.1 (2015)
- "Information Security and Legal Protection—from the Criminal Law perspective," Sandai law review Vol.88 No.2 (2015)
- “Reading ‘Panel Discussion Reports related to Countermeasures against Money-Laundering�,� Ginko Homu No. 778 (2014)
- “On Responses to Digital Attacks,� Financial Industry Information Systems No.333 (2014)
- “Countermeasures against Money-Laundering in the Context of Client Management,� in the book "Hiroshi Kawabawa Sensei Memorial Essay Collection Vol.2 (2014)
- "A Horizon for Money-Laundering Countermeasures Adapting to Changes in Social Circumstances," Turnaround & Credit Management Vol.25 No.4 (2012)
- "Corporate Risk & Governance: Ways of Dealing with Digital Attacks and Corporate Risk," Turnaround & Credit Management Vol.25 No.4 (2012)
- “Overview of ‘Panel Discussion Papers Regarding Ways for Businesses to Manage Clients to Prevent Money-Laundering�,� Weekly Financial Affairs No.62 (2010)
- Criminal Proceedings (4th edition), Keio University Press Inc. (2017)
- Basic Knowledge of Criminal Law Practice and Introduction to Special Criminal Law, Keio University Press Inc. (2015)
- Criminal Procedure Law (2nd edition), Sanseido Co., Ltd. (2009)
- Criminal Procedure Law (S series, 5th edition), Yuhikaku Publishing Co., Ltd. (2013) [Co-author]
- Easy Criminal Procedure Law (6th edition), Hougakushoin (2013)
- Practical Examples of Criminal Procedure Law, Hougakushoin (2013) [Co-author]
- Handbook of Pseudo Judgments of Criminal Law, Tokyo Horei Publishing Co., Ltd. (2011) [Co-author]
- Crossovers of Civil Procedure Law and Criminal Procedure Law, Hougakushoin (2010) [Co-author]
- How is a Crime Judged?, Seirin Shoin (2003) [Co-author]
- High-Tech Crime and Criminal Procedures, Keio University Press Inc. (2001)

WSG's members are independent firms and are not affiliated in the joint practice of professional services. Each member exercises its own individual judgments on all client matters.

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