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The FY2026 Tax Reform Outline (published Dec 12, 2025) introduces tighter documentation rules for intra-group transactions, affecting companies of all sizes. This measure specifically targets arbitrary pricing or lack of documentation for intra-group services (including IP transfers and loans), such as shared cost facilities.

If you are planning on doing business in Japan, knowledge of the investment environment and information on legal, accounting, taxation and human resource frameworks are essential to keeping you on the right track. This guide has been prepared for the assistance of those interested in doing business in Japan. It does not cover the subject exhaustively but is intended to answer some of the important, broad questions that may arise. When specific problems occur in practice, it will often be necessary to refer to the laws and regulations of Japan and to obtain appropriate accounting and legal advice. This guide contains only brief notes and includes legislation in force as of November 27, 2024.

The quality of AI outputs is improving with a pace too significant for it to be discounted. The oft repeated phrase is that AI and automation is ideal for tasks that are repetitive, follow a specific set of rules, and take a long period of time with manual input. For example, current AI can assimilate information from a Local File and use this to evaluate the comparability of comparable companies based on their business description and other information, providing acceptance and rejection reasons accordingly.

On February 19, 2024, the Organization for Economic Cooperation and Development (OECD) published its final report on Pillar 1 Amount B to simplify and streamline the application of the arm's length principle to baseline marketing and sales activities, with a focus on the needs of countries or regions with low tax enforcement capacity.

On October 8, 2021, it was announced that 136 of the 140 member countries of the OECD/G20 Inclusive Framework on BEPS, representing more than 90% of global GDP, agreed on new international tax rules, which is the Two-Pillar Solution to Address the Tax Challenges Arising from the Digitalisation of the Economy (“digital taxation”). As of November 15, 2023, 140 countries/regions have agreed.This digital taxation consists of “Pillar One” and “Pillar Two” and is a response to the situation where the current principles of international taxation are no longer fully functional as the economy becomes increasingly digitalized.

On June 10, 2022, the National Tax Agency revised the Administrative Guidelines on Operation of Transfer Pricing. The revision is intended to clarify Japan's transfer pricing tax treatment of related party transactions in light of the revision of Chapter Ⅷ (Cost contribution arrangement) and Chapter X (Transfer pricing aspects of financial transactions) of the OECD Transfer Pricing Guidelines for Multinational Enterprises and Tax Administrations.

On 20 January 2022, the OECD released the 2022 edition of the OECD Transfer Pricing Guidelines for Multinational Enterprises and Tax Administrations (“2022 edition”).

On December 18, 2020, the OECD released a “Guidance on the transfer pricing implications of the COVID-19 pandemic”. The Guidance represents the consensus view of the 137 members of the Inclusive Framework on BEPS regarding the application of the arm’s length principle and the OECD Transfer Pricing Guidelines to issues that may arise or be exacerbated in the context of the COVID-19 pandemic. The Guidance is helpful both for taxpayers in reporting the financial periods affected by the pandemic and for tax administrations in evaluating the implementation of taxpayers’ transfer pricing policies.