Abe, Ikubo & Katayama Law Firm is a Tokyo-based leader in intellectual property law, handling patent infringement litigation, portfolio management and IP strategy across a wide range of sectors. The firm has strong technical knowledge in pharmaceuticals, chemicals, biotechnology, electronics and telecommunications, and frequently represents clients before the Japan Patent Office, the IP High Court and other tribunals. This combination of technical depth and litigation experience enables clients to protect, enforce and monetize their IP assets effectively.

Beyond IP, the firm provides robust corporate and commercial advice, with emphasis on corporate reorganizations, M&A, international matters, finance and compliance. The team supports clients through complex restructurings, cross border transactions and strategic investments, helping businesses stabilize, reorganize and realize growth. The practice brings together lawyers with insolvency and restructuring expertise alongside corporate and transactional specialists to deliver integrated solutions.

AIK is known for high stakes disputes and litigation capabilities across IP and corporate matters, with a client service philosophy grounded in the 3S Spirit. The firm emphasizes responsive communication, practical strategy and long term client relationships, supported by a staff exceeding 160 professionals including attorneys, patent specialists and administrative personnel. The result is a service that combines rigorous legal analysis with efficient execution to achieve favorable results for clients.

About Abe, Ikubo & Katayama Law Firm

Founded in 1959


Practice areas
Intellectual Property
Corporate & Commercial
Lawsuits & Disputes
Banking & Finance

Languages spoken
English

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Practice areas

Intellectual Property

AIK's Intellectual Property practice delivers litigation and prosecution services across patents, trademarks and related rights, with a focus on pharmaceutical, chemical, biotechnology, electronics and telecoms sectors. The firm handles patent infringement actions, validity challenges and portfolio development, and coordinates strategy with patent offices and courts to protect clients' innovations.

Copyright
Patent
Trademark
Art & Cultural Property Law

Corporate & Commercial

AIK provides corporate advisory, M&A, international matters and compliance services, supporting clients through restructurings, financings and governance matters. The team integrates cross border capabilities with local expertise to help businesses execute transactions, manage risk and pursue growth.

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

Lawsuits & Disputes

AIK's litigation practice handles contentious matters across IP and corporate disputes, with experience in high profile cases and complex multi party proceedings. The team combines technical understanding with litigation strategy to achieve favorable outcomes for clients in court and arbitral settings.

ADR Mediation & Arbitration
Appeal
Class Action
General Litigation
Ethics and Professional Responsibility
Commercial Litigation
Antitrust Litigation
Restructuring & Insolvency

Banking & Finance

AIK offers banking and finance services including debt financing, restructuring, secured lending and financial regulatory matters. The team collaborates with corporate and insolvency specialists to support lenders and borrowers through restructurings, financings and enforcement proceedings.

Investment
Securities
Financial Services Regulation
Tax Increment Financing
Project Finance
Structured Finance
Acquisition / Leveraged Finance
Debt Capital Markets
Equity Capital Markets
Sustainable Finance
Public-Private Partnerships (PPP)
Funds & Asset Management

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