Many companies in Japan conduct lease transactions, such as office leases, copiers and vehicles, and these lease transactions are accounted for in accordance with IFRS, US GAAP or Japan GAAP and so on. Japan corporate tax law has particular treatments for lease transactions. This article provides an overview of leases from the lessee's perspective.

The Foreign tax credit system is designed to avoid international double taxation. It allows a corporation to deduct, within certain limits, the amount of foreign corporate income tax paid or withheld abroad from its corporate tax liability. A domestic corporation and a foreign corporation which has a permanent establishment in Japan are allowed to take advantage of the foreign tax credit. The following explanations are for a domestic corporation. A foreign corporation is able to take foreign tax credit for eligible foreign taxes on income attributable to a permanent establishment in Japan.

The corporations subject to the size-based business taxation have been revised with the 2024 (Reiwa 6) tax reform.

Pillar Two presents a complex web of rules, Income Inclusion Rule (IIR), Qualified Domestic Minimum Top-up Tax (QDMTT), and the Undertaxed Profits Rules (UTPR), formerly known as the Undertaxed Payments Rule. Multinational enterprises (MNEs) operating in Japan will need to understand the interaction of each rule enacted under Japan's domestic legislation.