• Admitted in Japan, 1987; Illinois (Foreign Legal Consultant), 1994; New York, 1995
• Daini Tokyo Bar Association
• Chicago Bar Association
• New York State Bar Association
• American Bar Association
• Director of The Licensing Executives Society Japan
• American Intellectual Property Law Association

1. The University of Tokyo (LL.B.) , 1985
2. Admitted in Japan, 1987, Daini Tokyo Bar Association
3. Joined Mori Sogo (currently, Mori Hamada & Matsumoto), 1987
4. University of Illinois, College of Law (LL.M.), 1993
5. Jenner & Block, Chicago, Illinois, 1993-1995
6. Admitted in Illinois (Foreign Legal Consultant), 1994, Chicago Bar Association
7. Admitted in New York, 1995, New York State Bar Association
8. The Federal Trade Commission of The United States, Washington, D.C., 1995
9. Lecturer of International Transaction Laws at Tokai University, 1996-1998
10. Established STW & Partners (currently, SHIOMIZAKA), 2007
11. Statutory Auditor (Outside Company), SEIKO PMC CORPORATION, June 2007-March 2019
12. Statutory Auditor (Outside Company), FURYU Corporation, June 2009-June 2019
13. Statutory Auditor (Outside Company), Meiji Holdings Co., Ltd., June 2013-
14. Auditor, parkrun Japan, April 2019-June 2020
15. Outside Director, Hitachi Transport System, Ltd., June 2020-
16. Established WATANABE & SHIMIZU, 2022

• Audit & Supervisory Board Member, SEIKO PMC CORPORATION, June 2007 – March 2019
• Audit & Supervisory Board Member, FURYU Corporation, June 2009 – June 2019
• Audit & Supervisory Board Member, Meiji Holdings Co., Ltd., June 2013-
• Auditor, parkrun Japan, April 2019 – June 2020
• Independent Outside Director, Member of the Board, Hitachi Transport System, Ltd., June 2020 – February 2023
• Member of the Special Committee, Hitachi Transport System, Ltd., May 2021 – October 2022
• Director, Tokyo Niigata Kenjin Kai, June 2022 – 
• Audit & Supervisory Board Member, Logisteed, Ltd., April 2013 –
• Vice President, Tokyo Niigata Kenjin Kai, June 2024 – 

1. “Copyright 2019” Global Practice Guide, Chambers and Partners, 2019 (Co-Author)*
2. “What You Should Learn before Taking Office as Outside Director — its Duties and Liabilities — (1-25)” Shojihomu Portal website, 2017-2018
3. “Copyright 2018” Global Practice Guide, Chambers and Partners, 2018 (Co-Author)*
4. “Recent Trends in the Enforcement of the Antitrust Laws by the U.S. DOJ” Fair Trade No. 782, Fair Trade Institute, 2015
5. “The Defense Practice for the Enforcement of the U.S. Antitrust Laws” (2nd ed.) Shojihomu Co., Ltd., 2015
6. “Trade secret law: guidelines revised” IAM Yearbook 2016, Globe Business Media Group, 2015 (Co-Author)*
7. “Experience at the Federal Trade Commission” Fair Trade No. 768, Fair Trade Institute, 2014
8. “Current State of and Defense Practice for Enforcement of Foreign Corrupt Practices Act in the U.S. – in comparison with Antitrust Laws” NBL No. 1022, Shojihomu Co., Ltd., 2014
9. “Review on Apple vs Samsung Patent Lawsuit” NBL No. 1018, Shojihomu Co., Ltd., 2014
10. “Enforcement of Antitrust law in the United States and practical considerations for entering into a plea agreement with the DOJ” NBL No. 990, Shojihomu Co., Ltd., 2012
11. “Very Basic Aspects of Business Law Practice – IP Law” Business Homu, Chuokeizai-Sha, Inc., December 2011
12. “Very Basic Aspects of Business Law Practice – IP Law” Business Homu, Chuokeizai-Sha, Inc., October 2011
13. “Practice on the Enforcement of the Antitrust Laws by the U.S. Department of Justice” Fair Trade No. 719, Fair Trade Institute, 2010
14. “The Defense Practice for the Enforcement of the U.S. Antitrust Laws” Shojihomu Co., Ltd., 2009
15. “License Business Practice (Practice in Intellectual Property No. 7)” Chuokeizai-Sha, Inc., 2009
16. “The Relationship between the Judgment Invalidating Patent Claims at an Appellate Court of Patent Infringement Lawsuit and the Decision of Correcting the Claims Rendered after the Judgment” Bimonthly Journal of A.I.P.P.I. Vol. 33 No. 6, 2008 (Co-Author)*
17. “Theory and Practice of Patent Infringement Litigation in the United States” Theory and Practice of Intellectual Property Laws, Shinnippon-Hoki Publishing Co., Ltd., 2007
18. “Enactment of Law Concerning the Application of Laws in General and Its Influence in Practice” LEXIS Kigyo-Homu, LexisNexis Japan Co., Ltd., 2006
19. “Patent Infringement Litigation (Practice in Intellectual Property No. 6)” Chuokeizai-Sha, Inc., 2003 (Co-Author)
20. “Internet Laws 4th Edition” Japan Institute of Business Law, 2003 (Co-Author)
21. “Domain Name Dispute, the Recent Cases (Sony Bank Decision)” Business Homu, Chuokeizai-Sha, Inc., May 2002
22. “Impact of Violation of the U.S. Antitrust Law by Japanese Corporations” Audit & Supervisory Board Members No. 459, Japan Audit & Supervisory Board Members Association, 2002
23. “Patent Law and Utility Model Law (Practice in Intellectual Property No. 1)” Chuokeizai-Sha, Inc., 2002 (Co-Author)
24. “Recent Situation Relating to the Extraterritorial Application of the U.S. Antitrust Law and its Background” Commercial Law Review Nos. 1484 and 1486, Japan Institute of Business Law, 1998
25. “Extraterritorial Application of Sherman Act on Criminal Penalty” Commercial Law Review No. 1481, Japan Institute of Business Law, 1998
26. “Extraterritorial Application of the U.S. Antitrust Law on Price Fixings in Japan” Commercial Law Review No. 1457, Japan Institute of Business Law, 1997
27. “Participation in a Board Meeting by an Interested Chairman” Commercial Law Review No. 1447, Japan Institute of Business Law, 1997
28. “The New Product Liability Act in the United States” NBL No. 573, Shojihomu Co., Ltd., 1995
29. “A New Joint Venture Vehicle for Japanese Investment in the U.S.: The Limited Liability Company” Commercial Law Review Nos. 1391 and 1392, Japan Institute of Business Law, 1995 (Co-Author)
30. “Opinion on the Delaware Supreme Court on Paramount v. Time-Warner Case” Commercial Law Review No. 1214, Japan Institute of Business Law, 1990
31. “Defense Tactics in M&A” edited by Mori Sogo Law Offices, Chuokeizai-Sha, Inc., 1990 (Co-Author)
32. “Failure of The Merger of UAL And The Legal Fees” Commercial Law Review No. 1203, Japan Institute of Business Law, 1989
33. “Decision of The Delaware Supreme Court on Rights of Shareholders” Commercial Law Review No. 1195, Japan Institute of Business Law, 1989
34. “Handling of Insider Trading Regulations” Shoji-Homu (Data Book) No. 56, Shojihomu Co., Ltd., 1988
35. “Insider Trading Regulations and Legal Services” Jurist No. 920, Yuhikaku Publishing Co., Ltd., 1988

NOTE: English publications are marked with *. All other publications are written in Japanese and their English titles listed above are translated from the Japanese originals only for reference purposes.

1. “Summary and evaluation of risk occurred by violations of US antitrust laws” Financial Facsimile News, August 26, 2011
2. “IP Litigation: Global Best Practices (A Conference of ABA Annual Meeting)” American Bar Association, August 9, 2008*
3. “California International Arbitration Conference” California Bar Association, February 28, 2008*
4. “IP Trends in the United States: Current State of IP Case Law, Patent Reform and Patent Valuation” Intellectual Property Association of Japan, June 17, 2006

NOTE: Seminars presented in English are marked with *. All other seminars were presented in Japanese and their English titles listed above are translated from the Japanese originals only for reference purposes.

1. Recommended by Chambers Asia-Pacific as Leading Individual in the sector of Intellectual Property for ten consecutive years (2010-2019).
2. Recommended by Chambers Global as Leading Individual in the sector of Intellectual Property for six consecutive years (2014-2019).
3. Named as one of the most highly regarded experts in the area of intellectual property by Who’s Who Legal 2023.
4. Named as one of the most highly regarded experts in the area of patent law by Who’s Who Legal for eight consecutive years (2014-2021).
5. Named as one of the most highly regarded experts in the area of intellectual property by Who’s Who Legal: Japan for eight consecutive years (2014-2021).
6. Recognized in The Best Lawyers in Japan 2025 in the fields of Antitrust / Competition Law, Corporate Governance and Compliance Practice, Criminal Defense, Intellectual Property Law and Patent Law.
7. Recognized in The Best Lawyers in Japan 2024 in the fields of Antitrust / Competition Law, Corporate Governance and Compliance Practice, Criminal Defense, Intellectual Property Law and Patent Law.
8. Recognized in The Best Lawyers in Japan 2023 in the fields of Antitrust / Competition Law, Corporate Governance and Compliance Practice, Criminal Defense, Intellectual Property Law and Patent Law.
9. Recognized by Best Lawyers for 13 consecutive years since 2009.
10. Recognized in The Best Lawyers in Japan 2022 in the fields of Antitrust / Competition Law, Corporate Governance and Compliance Practice, and Intellectual Property Law.
11. Named as one of the experts in the area of patents in Asia Pacific by LEGAL MEDIA GROUP.
12. Named as one of the 2018 Top 100 Lawyers by Legal Comprehensive.
13. Named as a leading lawyer in “Lawyer of the Year – Japan” in 2017 Golden Global Awards by Legal Comprehensive.
14. Named as a leading lawyer in “Lawyer of the Year-Antitrust & Competition” in the 2017 LawyerIssue awards by the LawyerIssue.
15. Recommended as a leading lawyer in Asialaw Profiles 2016.
16. Named as a leading lawyer in “Global Awards 2015” published by Corporate LiveWire.
17. Named to The Best Lawyers in Japan 2015 in the practice area of intellectual property.
18. Named as one of the leading lawyers in the area of litigation and patent law by Asia IP Expert 2015.
19. Selected as one of the most highly acclaimed legal experts in Japan for Dispute Resolution and Intellectual Property by Asialaw Leading Lawyers for six consecutive years (2013-2018).
20. Named as a leading lawyer in “ICFM 500 Leading Lawyer” published by the InterContinental Finance Magazine for three consecutive years (2013-2015).
21. Recommended by IAM Patent 1000 – The World’s Leading Patent Professioinals as Leading Individual for seven consecutive years (2012-2018).