Yukiko Moriyama

Partner, Member of Daini Tokyo Bar Association

Yukiko Moriyama’s practice focuses on general corporate and compliance matters, including commercial contracts, debt collection, and labor and employment. She is highly regarded for her work on information-related legal affairs, including the Personal Information Protection Law, the Law Against Unjustifiable Premiums and Misleading Representations, and the Information Disclosure Act. She worked on the legislation process as an Assistant Counselor in the Preparatory Office for Revision of the Information Disclosure Act, Cabinet Secretariat. She was also involved in the revisions of the Personal Information Protection Law and the Law for Preventing Unjustifiable Premiums and Misleading Representations. 

Ms. Moriyama has assisted clients in the establishment of a compliance system in accordance with the revised Personal Information Protection Law. She has also served as an advisor to many clients in the field of IT and other information-related matters, and authored and lectured extensively on those topics. Recognized for her expertise in information / data law as well as her gender perspective, she is frequently consulted by companies targeting women as their primary customers, such as those in the fashion and cosmetics industries. Ms. Moriyama is experienced in corporate governance issues, as she serves as an independent director of a publicly listed manufacturer of medical products and sits on its nominating committee.

Ms. Moriyama also handles cases of family affairs including inheritance, adult guardianship, and will preparation.

Education and Professional Background

2000 : Graduated from Yokohama National University, Graduate School of International Social Sciences, Department of International and Business Law (LL.M. in International Business Law)
2007 : Graduated from Omiya Law School (J.D.)
2008 : Registered as attorney at law in Japan
2010 : Assistant Director to the Counselor of the Office for Information Disclosure Act Amendment, Cabinet Secretariat (till 2012)
2015 : Participated as one of the founding partners of Waseda Legal Commons, LPC

Main Industries of Clients

IT, fashion and cosmetics, medical and pharmaceutical, education, and music

Practice Areas

Legal consultation related to information, including the Act on the Protection of Personal Information, and Premiums and Representation Act.

Membership and Official Positions

Advisor, NPO Japan Network Security Association


Editor, Daini Tokyo Bar Association Information Disclosure and Personal Information Protection Committee (Editor), “Practical Response to the Personal Information Protection Law Revised in 2020 – Q&A and Examples”, Shin Nihon Hoki, 2021
(Editor), “Legal Practice of AI and Robots Q&A / Daini Tokyo Bar Association Information Disclosure and Personal Information Protection Committee,” Keiso Shobo, 2019
The “This One Book! All the Essentials of the Revised Civil Code,” Nihon Jitsugyo Shuppansha, 2017 (co-author)
The New Personal Information Protection Law – Q&A and Example Forms -,” Shin Nihon Hoki, 2017 (editor).
Q&A Revised Personal Information Protection Law -Frontline of Personal Data Protection Legislation-, Shin Nihon Hoki, 2015 (editor)
Business Law for Small and Medium-Sized Enterprises,” Nihon Jitsugyo Shuppansha, 2012 (co-author).
Q&A on Personal Information Protection in the Age of Social Media,” Daini-Tokyo Bar Association (ed.), Nippon Hyoronsha, 2012 (author in charge of writing)
Check & Draft International Contracts – English/Chinese Counterparts – (WEB Edition),” Dai-Ichi Hoki, 2012 (in charge of writing).
Intellectual Property Law Hanrei Digest,” Tax and Accounting Association of Japan, 2010 (author in charge of writing).
Lawyer CASE FILE 4: Involved in the Drafting of the Bill to Amend the Information Disclosure Act,” Toki no Hourei, December 15, 2048, No. 2087 (in charge of writing).
Recent Trends in Harassment and Corporate Countermeasures,” KAISHA HOMU A2Z VOL2019-05
Financial Practice Q&A on the Revised Personal Information Protection Law,” Banking Practice No. 703
Revision of the Personal Information Protection Law and Practical Points to Keep in Mind,” Banking Practice No. 691 (in Japanese)
Basic Mechanism of the Premiums and Representation Law,” Business Homu, February 2015, 2014
The “Premiums and Representation Law” Lesson [September 2014 – May 2015], Nihon Jitsugyo Shuppansha, 2014-2015.
 (1) – What does the Premiums and Representation Law regulate,” Corporate Practice No. 726
 (2) – “Favorable Misleading Representations,” Corporate Practice No. 727
 (3) Country of Origin Labeling and Decoy Labeling: Corporate Practice No. 729
 (iv) – “Excessive Premium Offers” – “Corporate Practice No. 731
 (5) – Prize Giving as a Method of Offering Premiums -, Corporate Practice No. 732
 (vi) “Double Price Labeling” (Corporate Practice No. 733)
 (vii) “Premiums and Representations Act and Internet Representations” (Corporate Practice No. 734)
 (viii) “Labeling of food and the Act against Unjustifiable Premiums and Misleading Representations” (Kigyo Jitsumu No. 735)
 (9) Specific Examples of Food Labeling,” (Corporate Practice No. 738)
 (10) Standards of Reasonable Grounds,” (Corporate Practice No. 740)
 (11) Revision of the Act against Unjustifiable Premiums and Misleading Representations, Business Practice No. 741
 (12) Labeling of Soft Drinks, etc., Corporate Practice No. 744
 (13) – Misleading Representations in the Beauty Industry, etc.,” (Corporate Practice No. 746)
 ⑭Implementation of a surcharge system under the revised Unjustifiable Premiums Law,” (Corporate Practice No. 747)
 (xv) – Cases of receiving a measure order under the Act against Unjustifiable Premiums and Misleading Representations,” (Corporate Practice No. 750)
 (xiv) – Final Summary of the Premiums and Representation Law,” Corporate Practice No. 751
What to Do in Such Cases: Company Legal Q&A: Internet Sales and the Act on Specified Commercial Transactions,” Gekkan Ishigaki, September 2013, The Japan Chamber of Commerce and Industry, 2013.
Serialization: “Protection of Personal Information and Leakage Prevention Measures Learned from Cases,” Kigyou Jitsugyo (Business Practice), Nihon Jitsugyo Shuppansha, 2012
 Preventing Leakage of Personal Information from Contractors,” Kigyo Jitsugyo (Business Practice), No. 712, 2012.
 2) Leakage of personal information due to the negligence of outsourcing partners,” Kigyo Jitsumu No. 714 (in Japanese)
 (iii) Issues concerning the list of participants in a lecture meeting,” Corporate Practice No. 716
 (4) Leakage from employees of outsourcing partners, Corporate Practice No. 717
 (5) Leakage of sensitive information from employees – Corporate Practice No. 719
 (6) Risk of Inadvertent Collection of Personal Information, Corporate Practice No. 720
 (7) Extra Edition: Information Disclosure Act, Corporate Practice No. 722
 (8) End of Serialization – Review of Corporate Measures -,” Corporate Practice No. 723
The Information Disclosure Act: Its System and Possibility of Use,” Business Law Journal, November 2012, LexisNesxis, 2012.
The Bill to Amend the Access to Information Act: Stipulating and Guaranteeing the People’s Right to Know,” Freedom and Justice VOL 63, Japan Federation of Bar Associations, 2012.
The Amendment to the Personal Information Protection Law and Local Governments’ Responses: Looking Ahead to Local Governments’ DX,” Jichiro Tsushin 2022 Summer Issue, pp. 8-9, 2022.


Harassment, compliance, Act against Unjustifiable Premiums and Misleading Representations, personal information, etc.


I try to provide easy-to-understand explanations.
The best decision in various situations and conditions differs from person to person and company to company.
As an attorney, I will analyze the current situation, explain it in easy-to-understand language and simple diagrams, work with you to find a solution, and ultimately support you in making the best decision and business judgment.
Please feel free to consult with me.