Introduction: As Japan moves into the second half of 2025, its corporate tax system is entering a new phase of adjustment and recalibration. Amid continued fiscal constraints and a gradual normalization of economic activity, the Japanese government is using corporate tax reform to better guide investment behavior and capital allocation while maintaining overall tax structure stability.Unlike previous approaches that emphasized broad-based tax cuts, current policy discussions focus on how tax system design affects corporate tax burdens, the timing of expense recognition, and tax planning strategies. For companies operating in or entering the Japanese market, these developments have direct implications for tax management, cash-flow planning, and compliance.