Masui & Partners provides corporate and commercial legal services with a focus on both domestic and cross-border matters. The practice includes M&A, business succession, corporate governance design, and regulatory compliance, supported by the representative attorney's experience at a top U.S. law firm and a broad international network. The firm combines sophisticated legal insight with a practical, business-oriented approach to help clients navigate complex corporate transactions and compliance challenges.

Real estate, venture capital, IT and intellectual property, cross-border contracts, and debt related matters are among the firm's core areas, with a dedicated emphasis on aligning legal strategy with a client's business objectives. The team provides guidance on real estate transactions, SPC based investments, and financing, as well as regulatory considerations for startups and growth companies, enabling clients to pursue opportunities with confidence.

Masui & Partners is committed to client service through a multi-office platform and a collaborative culture. The firm operates from Tokyo, including Ikebukuro Hareza Tower and Toranomon, with additional offices in Osaka and Fukuoka, and offers English language support to assist international clients. A transparent fee structure and a focus on efficient dispute resolution underpin the client experience, enabling rapid response and practical guidance.

About Masui Total Law Office

Founded in 2021

9 people in their team


Practice areas
Corporate & Commercial
Real Estate
Employment & Labor
Accidents & Injuries
Lawsuits & Disputes

Languages spoken
English

Social media

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Practice areas

Corporate & Commercial

Masui & Partners delivers corporate and commercial legal services that cover domestic and cross-border matters, including M&A, business succession, governance design, and regulatory compliance. The firm relies on the founder's experience at a major U.S. firm and a broad global network to provide pragmatic, business-oriented advice that aligns legal strategy with the client's objectives and supports growth and governance needs.
Administrative
Admiralty & Maritime
Agriculture
Antitrust
Aviation
Business Registration
Contract
Due Diligence
Franchising
Gaming
Government Contract
Licensing
Merger & Acquisition
Transportation
Venture Capital
Cannabis Law
Nonprofit & Charitable Organizations
International Trade Law
Government Relations & Lobbying
Private Equity
Corporate Governance
Sanctions & Export Controls

Real Estate

Masui & Partners provides guidance on real estate transactions and leasing, including investment structuring with SPCs, development projects, financing arrangements, and regulatory considerations. The firm also supports clients in real estate-related disputes, drawing on practical experience to resolve contractual and title issues efficiently.
Commercial Real Estate
Housing, Construction & Development
Foreclosure
Land Use & Zoning
Landlord & Tenant
Mortgage
Real Estate Due Diligence
Real Estate Contracts and Negotiations
Brokerage
Conveyancing

Employment & Labor

Masui & Partners advises on personnel and labor matters, helping clients manage compliance with labor laws, performance issues, terminations, wage claims, and workplace investigations. The firm emphasizes preventive strategies and clear negotiation approaches to reduce risk and resolve disputes effectively.
Employment Rights
Hiring & Firing
Job Discrimination
Labor Law
Pension
Retirement
Sexual Harassment
Social Security
Wage & Hour
Wrongful Termination
Whistleblower & Qui Tam
Employment Benefits & Executive Compensation

Accidents & Injuries

Masui & Partners handles accidents and injuries, representing both victims and responsible parties in traffic accidents and other personal injury matters. The team seeks appropriate compensation, assists with insurance negotiations, and pursues litigation when needed to achieve favorable outcomes.
Animal & Dog Injury
Assault & Battery
Birth Injury
Brain Injury
Car Accident
Construction Accident
Dangerous Product
Defamation
Drugs & Medical Devices
Medical Malpractice
Motor Vehicle Defect
Motorcycle Accident
Personal Injury
Premises Liability
Property Damage
Sexual Abuse
Toxic Mold
Toxic Tort
Travel Accident
Truck Accident
Work Injury
Workers Compensation
Wrongful Death

Lawsuits & Disputes

Masui & Partners specializes in lawsuits and disputes, providing strategic guidance in contentious litigation and other dispute resolution. The firm leverages its cross-border capabilities and experience with regulatory authorities to protect clients' rights and achieve efficient, results oriented resolutions.
ADR Mediation & Arbitration
Appeal
Class Action
General Litigation
Ethics and Professional Responsibility
Commercial Litigation
Antitrust Litigation
Restructuring & Insolvency

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