SAITO Hiroki
- Title
- Partner
- Bar Association
- Tokyo Bar Association
- Languages
- English
- Telephone Number
- +81-3-3214-6232
- E-mail address
- [email protected]
Practice Areas
Engaged Cases
Mr. Saito has been engaged in IT-related cases as well as general corporate legal services, litigation/dispute resolution and crisis management. (preparation of internal control system in normal times and emergency response.)
The main legal services he provides for IT-related cases are as follows.
1. Cases related to systems and software
・ Providing advice, drafting contracts and handling dispute resolution regarding system development, system operation and system maintenance
・ Providing legal advice and drafting contracts regarding software license (including OSS license)
・ Providing advice and drafting contracts regarding cloud services
・ Providing advice and drafting contracts regarding development of systems using AI technology
2. Cases related to digital forensic
・ Providing advice on digital forensics analysis performed for various investigations (i.e. accounting malpractice and information leakage), collaborating with digital forensics companies
・ Providing advice on using the results of digital forensics analysis in trial
3. Provision of Advice on various operations, initial responses, and investigation policy with respect to cases related to cyber security, taking-out of information, information leakage, etc.
・ Providing advice on external disclosure, customer relations, and response to business partners.
・ Providing advice on handling of criminal cases (filing criminal complaints, cooperating in investigations, comprehending the extent of damage based on investigations, etc.)
・ Providing advice and dispute resolution regarding the pursuit of liabilities to the executives and employees and the IT vendors that caused the leakage
4． Cases related to electronic signature, digitization of contracts, etc.
・Providing advice on the system and use of electronic signature
・Providing advice on digitization services for contracts, etc.
Career Summary
- August 1987
- Born in Kanagawa Prefecture, Japan
- March 2006
- Graduated from Eiko Gakuen Senior High School
- March 2010
- Received his LL.B. from the University of Tokyo
- March 2012
- Received his J.D. from the University of Tokyo School of Law
- December 2013
- Received his Diploma from the Legal Training and Research Institute of the Supreme Court of Japan (66th)
- December 2013
- Registered as a Japanese attorney
- January 2014
- Joined STW & Partners
- September 2017
- Joined Iwata Godo
Awards
The Best Lawyers in Japan 2025
The Best Lawyers in Japan 2024
The Best Lawyers in Japan 2023
List of Main Publications
"Civil Law for Legal Managers" (co-author, Shoji Homu, 2024)
“Three Reasons for Corporate Corruption: Is there Integrity?” (co-author, Chuokeizai-sha, 2023)
“Lexology GTDT – Cloud Computing 2023” (co-author, Law Business Research, 2022)
“Ransomware Attacks: Crisis Management and Other Issues” (August 2022 issue of Kansayaku, 2022)
“6,000 Lectures on Legal Issues for Financial Institutions” (co-author, Kinzai Institute For Financial Affairs, 2022)
"Directors/Auditors and Risk Management/Internal Control System" (co-author, December 2021 issue of Gekkan Kansayaku, 2021）
“How to Deal with Rising Risk of Information Leakage? Countermeasures for Protecting and Handling Trade Secrets – Case 1: External Cyber Attacks, Case 2: Negligence and Non-Compliance by Current Employees, Case 3: Misappropriation of Information by a Departing Employees and Alleged Disclosure/Use at his/her New Employer” (co-author, December issue of Business Houmu, 2021)
"Lexology GTDT – Cloud Computing 2022”（co-author, Law Business Research）
"Points in Communicating with Outside Directors in Time of Peace and Emergency”（co-author, October issue of Gekkan Kansayaku, 2021）
"Lexology GTDT – Cloud Computing 2021”（co-author, Law Business Research）
“Q&A: Interaction of the Antimonopoly Act and Intellectual Property Rights and Legal Practices – Guide to Understand from Basic to Application and Achieve Compliance” (co-author, Nihon Kajo Publishing Co., Ltd., 2020)
“Theories and Business Practices of Prescription and Limitation of Period ［Intellectual Property Law］ ” (co-author, Nihon Kajo Publishing, 2018)
“Roles of Auditors, etc. for Corporate Scandals: Detective Controls and Response to Investigation, etc. - the 6th article of the series “Introduction Course for Newly Appointed Auditors: Authority, Responsibility, and Response for Misconduct” (co-author, December 2018 issue of a monthly magazine, Gekkan Kansayaku)
“Laws and Regulations that Auditors, etc. must be familiar with” - the 1st article of the series “[New Series] Introduction Course for Newly Appointed Auditors: Authority, Responsibility, and Response for Misconduct” (co-author, July 2018 issue of a monthly magazine, Gekkan Kansayaku)
Publications
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202504
Financial Services Agency, Request to All Listed Companies to Provide Appropriate Information (Submission of Securities Reports) Prior to the General Meeting of Shareholders
Publisher：Shoji Homu Portal website
- Author：
- SAITO Hiroki
-
202412
Shoji Homu publishes a new edition of Civil Law for Legal Managers, authored by Toji Yoshihiro and Saito Hiroki
- Author：
- TOJI Yoshihiro SAITO Hiroki
-
202412
Saito Hiroki authors a commentary on the Cabinet Secretariat's working group on cyber security (Shoji Homu Portal website)
- Author：
- SAITO Hiroki
-
202408
Saito Hiroki authors a commentary on the AI policy working groups of the Cabinet Office (Shoji Homu Portal website)
- Author：
- SAITO Hiroki
-
202310
Saito Hiroki authors a commentary on the National Police Agency's release on cyberspace threats (Shoji Homu Portal website)
- Author：
- SAITO Hiroki
-
202310
Motomura Takeshi and Saito Hiroki co-author "Three Reasons for Corporate Corruption: Is there Integrity?" (Chuokeizai-sha)
- Author：
- MOTOMURA Takeshi SAITO Hiroki
-
202304
Saito Hiroki authors a commentary on the views of the Japan Audit & Supervisory Board Members Association concerning amendments to disclosure regulations (Shoji Homu Portal website)
- Author：
- SAITO Hiroki
-
202210
Saito Hiroki authored a commentary on MHLW's proposed guidelines for the application of medical device regulations to software programs (Shoji Homu Portal website)
- Author：
- SAITO Hiroki
-
202209
Matsuda Akira, Saito Hiroki and Ito Natsuho co-authored Lexology GTDT - Cloud Computing 2023(Law Business Research)
- Author：
- MATSUDA Akira SAITO Hiroki ITO Natsuho
-
202207
Saito Hiroki authored "Ransomware Attacks: Crisis Management and Other Issues" in the August issue of Kansayaku.
- Author：
- SAITO Hiroki
-
202203
Saito Hiroki's commentary on the FSA's March 4 release on Key Audit Matters (KAM) is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
202202
The lawyers of our firm participated in the writing of 6,000 Lectures on Legal Issues for Financial Institutions (Kinzai Institute for Financial Affairs, Inc.)
- Author：
- WAKABAYASHI Shigeo TOJI Yoshihiro TAGO Shinya MOTOMURA Takeshi YOSHIHARA Tomomichi URANAKA Hirotaka UEDA Atsushi SAKAMOTO Tomoko IZUMI Atsushi TANAKA Takashi OKUSHI Kenichi KASHIWAGI Kensuke EIGUCHI Manabu ITO Hiroki ITO Nanako MARUYAMA Shinji MATSUDA Takao FUJIWARA Hiroki MATSUDA Akira AOKI Shinji TOKUMARU Daisuke MUTOU Yuuki FUKASAWA Atsushi KAKUNO Shu TOMITA Yusuke IIDA Hiroshi UENISHI Takuya KUDO Ryohei MORI Shunsuke KARASAWA Akira AOYAMA Masahiro SAITO Hiroki IKEDA Minako ISHIKAWA Teppei YAMADA Kohei SUZUKI Tomohiro SEKIGUCHI Akimasa NAKAMURA Saeko FUKATSU Haruno ADACHI Makoto FUKUCHI Takumi MATSUHASHI Sho KUKIMOTO Sayaka KANEKI Nobuyuki
-
202111
Motomura Takeshi and Saito Hiroki co-authored "Directors, Statutory Auditors and Risk Management/Internal Control Systems" in the December issue of the journal Kansayaku.
- Author：
- MOTOMURA Takeshi SAITO Hiroki
-
202110
Kudo Ryohei and Saito Hiroki co-authored "How to Deal with Rising Risk of Information Leakage? Countermeasures for Protecting and Handling Trade Secrets - Case 1: External Cyber Attacks, Case 2: Negligence and Non-Compliance by Current Employees, Case 3: Misappropriation of Information by a Departing Employees and Alleged Disclosure/Use at his/her New Employer” in the December issue of Business Houmu (published by Chuokeizai-Sha).
- Author：
- KUDO Ryohei SAITO Hiroki
-
202110
Matsuda Akira, Saito Hiroki, and Ito Natsuho co-authored Lexology GTDT - Cloud Computing 2022, published by Law Business Research.
-
202109
Motomura Takeshi and Saito Hiroki co-authored an article titled "Points of Communications with Outside Directors in Normal Times and in the Event of Emergency" which appears in October 2021 issue of Journal for Audit & Supervisory Board Members.
- Author：
- MOTOMURA Takeshi SAITO Hiroki
-
202109
Saito Hiroki's commentary titled "The Ministry of Internal Affairs and Communications Releases the "Interim Report of the Study Group on Platform Services" is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
202106
Eiguchi Manabu and Kudo Ryohei contributed to as editors and authors, and Saito Hiroki, Sekiguchi Akimasa and Adachi Makoto authored, the publication entitled "Q&A: Complexity and Business Practice of the Anti-Monopoly Act and Intellectual Property Rights; Guidance for Achieving Compliance by Understanding from Basics to Applications,” which was introduced in “Introduction of New Publications” of June 2021 issue of Chizaikanri.
- The author and editor：
- EIGUCHI Manabu KUDO Ryohei
-
202102
Saito Hiroki's commentary titled "The Ministry of Internal Affairs and Communications Prepared the 'Telework Security Guideline (5th edition)' and has Started Requesting for Public Comments on the Said Guideline." is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
202012
With Eiguchi Manabu and Kudo Ryohei as the editors & authors, Saito Hiroki, Sekiguchi Akimasa, and Adachi Makoto co-authord "Q&A on Intersection and Practice of the Antimonopoly Act and the Intellectual Property Rights - Guidance for Achieving Compliance by Understanding from Fundamentals to Applications – " which is introduced in “The Latest Books to be Kept on Hand in the practice of the Antimonopoly Act” of February 2021 issue of Business Law Journal.
- Editor：
- EIGUCHI Manabu KUDO Ryohei
-
202011
Matsuda Akira and Saito Hiroki co-author Lexology GTDT - Cloud Computing 2021 (Law Business Research)
- Author：
- MATSUDA Akira SAITO Hiroki
-
202009
Saito Hiroki's commentary titled "The Ministry of Economy, Trade and Industry Revises the 'Interpretative Guidelines on Electronic Commerce and Information Property Trading' " is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
202008
Eiguchi Manabu and Kudo Ryohei contributed to as editors and authors, and Saito Hiroki, Sekiguchi Akimasa, and Adachi Makoto authored, the publication entitled “Q&A: Complexity and Business Practice of the Anti-Monopoly Act and Intellectual Property Rights; Guidance for Achieving Compliance by Understanding from Basics to Applications,” which was published by Nihon Kajo Publishing Co., Ltd.
- Editor：
- EIGUCHI Manabu KUDO Ryohei
-
202004
Saito Hiroki's commentary titled "National Center of Incident Readiness and Strategy for Cybersecurity Releases 'Points to Note About Security in Conducting Telework'" is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
201912
Saito Hiroki's commentary titled "The Agency for Cultural Affairs Holds the 2nd Working Team on the State of System on License Agreements for Copyrighted Works" is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
201907
Saito Hiroki's commentary titled "The Japanese Institute of Certified Public Accountants Publishes a Message from Chairman and President titled 'Introduction of Key Audit Matters'" is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
201903
Saito Hiroki's commentary titled "Cabinet Decision on the 'Bill for the Act of Partial Revision of the Patent Act'" is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
201811
Saito Hiroki's commentary titled "The Japan Fair Trade Commission Closes the Investigation on the Suspected Violation of the Antimonopoly Act by Airbnb Ireland UC and Airbnb Japan K.K." is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
201807
A book authored by our lawyers entitled Theories and Business Practices of Prescription and Limitation of Period is published by Nihon Kajo Publishing Co., Ltd.
- Author：
- KASHIWAGI Kensuke EIGUCHI Manabu ITO Hiroki AOKI Shinji MUTOU Yuuki ITO Nanako FUJIWARA Hiroki MATSUDA Akira TOKUMARU Daisuke MARUYAMA Shinji KAKUNO Shu TOMITA Yusuke UENISHI Takuya KUDO Ryohei BEPPU Fumiya MORI Shunsuke KARASAWA Akira SAITO Hiroki YAMADA Kohei HORITA Koji SUZUKI Tomohiro NAKAMURA Saeko SASAKI Tomoo YU Zhiming Landry GUESDON
- Editor：
- TAGO Shinya OKUSHI Kenichi IIDA Hiroshi
-
201806
Motomura Takeshi supervised and Ito Hiroki and Saito Hiroki authored the 1st article of the series "[New Series] Introduction Course for Newly Appointed Auditors: Authority, Responsibility, and Response for Misconduct" titled "Laws and Regulations that Auditors, etc. must be familiar with” which appears in the July 2018 issue of a monthly magazine, Gekkan Kansayaku.
- Author：
- ITO Hiroki SAITO Hiroki
- Supervising editor：
- MOTOMURA Takeshi
-
201801
Saito Hiroki's commentary titled "The Personal Information Protection Commission Releases the Hiyari Hat (Near-miss) Instance Regarding Personal Information on its Website" is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
201712
Saito Hiroki's commentary titled "Case Where the Intellectual Property High Court Ruled that the Registered Trademark 'MEN'S CLUB' is Likely to Cause Confusion in Connection with the Goods Pertaining to the Plaintiff's Business" is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
-
201709
Saito Hiroki's commentary titled "Softbank Receives Administrative Order from the Consumer Affairs Agency in Violation of the Act against Unjustifiable Premiums and Misleading Representations" is available on the Shoji Homu Portal Site.
- Author：
- SAITO Hiroki
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Seminars
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202503
"Seminar on the Civil Code as it relates to the drafting and administration of contracts, including an update on e-contracts and other legal tech"
Speaker： SAITO Hiroki
-
202407
IG hosts a webinar "AI-Related Laws, Policies, Issues: Update for Business Lawyers"
Speaker： SAITO Hiroki SEKIGUCHI Akimasa
-
202406
For Shoji Homu's "Business Law School" seminar series, Saito Hiroki gives a seminar on the Civil Code as it relates to the drafting and administration of contracts, including an update on electronic contracts
Speaker： SAITO Hiroki
-
202405
For Shoji Homu's "Business Law School" seminar series, Saito Hiroki gave a seminar on the Civil Code as it relates to the drafting and administration of contracts, including recent developments in electronic contracts
Speaker： SAITO Hiroki
-
202405
Saito Hiroki gave a seminar "Update on Electronic Contracts, Signatures and Document Management" for Shoji Homu's Claims Management Study Group
Speaker： SAITO Hiroki
-
202209
Motomura Takeshi, Mutou Yuuki and Saito Hiroki gave an online seminar "How Listed Companies Should Handle the Discovery of an Accounting Error"
Speaker： MOTOMURA Takeshi MUTOU Yuuki SAITO Hiroki
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202202
Saito Hiroki conducted an online seminar "The Effectiveness of Remote Internal Audits" jointly with AOS Data, Inc.
Speaker： SAITO Hiroki
-
202201
Saito Hiroki conducted an online seminar "Practical Response to Ransomware Attacks - from the Perspectives of the Law Firm and the Digital Forensics Expert" jointly with Fronteo Inc. Video of this seminar is currently distributed online.
Speaker： SAITO Hiroki
-
202109
Fujiwara Hiroki, Kudo Ryohei, and Saito Hiroki conducted a seminar titled "Labor Management and Information Security Measures during Telework" at Tokyo Hosen-Kai.
Speaker： FUJIWARA Hiroki KUDO Ryohei SAITO Hiroki
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News
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202505
Comments by Saito Hiroki were featured in an article titled "Third-party committee's 'facts' diverge from the court and authorities; Party refutes Fuji TV's allegations"
Publisher：The May 30 Nikkei (online edition)
-
202404
20 lawyers of our firm were recognized in The Best Lawyers in Japan 2025.
Best Lawyers
■ Antitrust / Competition Law
TOJI Yoshihiro
■ Arbitration and Mediation
UEDA Atsushi
■ Banking and Finance Law
TOJI Yoshihiro
SAKAMOTO Tomoko
MATSUDA Takao
■ Corporate and Mergers and Acquisitions Law
MOTOMURA Takeshi
■ Corporate Governance and Compliance Practice
YOSHIHARA Tomomichi
■ Insolvency and Reorganization Law
TAGO Shinya
MOTOMURA Takeshi
URANAKA Hirotaka
■ Labor and Employment Law
TAGO Shinya
■ Litigation
TOJI Yoshihiro
WAKABAYASHI Shigeo
MOTOMURA Takeshi
YOSHIHARA Tomomichi
URANAKA Hirotaka
Best Lawyers - "Ones to Watch"
■ Antitrust / Competition Law
ISHIKAWA Teppei
■ Arbitration and Mediation
SAITO Hiroki
NAKAMURA Saeko
■ Corporate and Mergers and Acquisitions Law
KARASAWA Akira
IKEDA Minako
YAMADA Kohei
SUZUKI Tomohiro
FUKUCHI Takumi
■ Information Technology Law
SAITO Hiroki
■ Intellectual Property Law (Non-Patent)
ISHIKAWA Hiroaki
■ Labor and Employment Law
KITAGAWA Hiroki
■ Privacy and Data Security Law
HORITA Koji -
202305
19 lawyers of our firm were recognized in The Best Lawyers in Japan 2024.
Best Lawyers
■ Antitrust / Competition Law
TOJI Yoshihiro
■ Arbitration and Mediation
UEDA Atsushi
■ Banking and Finance Law
TOJI Yoshihiro
SAKAMOTO Tomoko
MATSUDA Takao
■ Corporate and Mergers and Acquisitions Law
MOTOMURA Takeshi
■ Insolvency and Reorganization Law
TAGO Shinya
URANAKA Hirotaka
■ Labor and Employment Law
TAGO Shinya
■ Litigation
TOJI Yoshihiro
WAKABAYASHI Shigeo
MOTOMURA Takeshi
YOSHIHARA Tomomichi
URANAKA Hirotaka
■ Product Liability Litigation
TOJI Yoshihiro
Best Lawyers - "Ones to Watch"
■ Antitrust / Competition Law
ISHIKAWA Teppei
■ Arbitration and Mediation
SAITO Hiroki
■ Corporate and Mergers and Acquisitions Law
KARASAWA Akira
IKEDA Minako
YAMADA Kohei
SUZUKI Tomohiro
FUKUCHI Takumi
■ Information Technology Law
SAITO Hiroki
■ Intellectual Property Law (Non-Patent)
ISHIKAWA Hiroaki
■ Labor and Employment Law
KITAGAWA Hiroki
■ Privacy and Data Security Law
HORITA Koji -
202301
Saito Hiroki, Ikeda Minako and Ishikawa Teppei were appointed Partners.
-
201709
We welcomed a new attorney, Saito Hiroki.
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