Yukiko Moriyama

Partner, 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)


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.


Japanese, English