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Statutory audits
As a member firm of Grant Thornton International (GTIL), we provide international-standard audit & assurance services. We perform audit services effectively and efficiently by utilising our global audit methodologyo deliver consistent audit services globally and the integrated audit tool (Leap) to maintain audit quality and improve audit efficiency. Also our audit services are regularly reviewed by GTIL review team, thereby allowing us to further improve our audit quality.
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IPO voluntary audits
Grant Thornton Taiyo LLC provides audits for preparing for public offering, based on its extensive experience, to many companies aiming to go public.
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Other voluntary audits
Grant Thornton Taiyo LLC provides various types of discretionary audits based on the request of management.
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Information security audit
We verify and evaluate the state of appropriate controls based on information security risk assessments, and provide accurate advice to help improve information security.
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Business Tax Services
Growing businesses need strong tax management to meet current and future tax liabilities and we can help you achieve this, whatever challenges you face.
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Private Client Consulting
Private Client Consulting team provides a comprehensive cross section of advisory services to high net worth individuals and corporate executives, allowing such individuals to concentrate on their business interests.
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International Tax Services
In an ever-increasing environment of global competition, businesses must now cope with not only the complexity of different global operating environments, but also with global tax, legislative and corporate regulatory requirements.
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Transaction Tax
Our collaborative approach creates dynamic teams with a range of financial, commercial and operational backgrounds. We can help you understand the value drivers behind successful transactions. We support you throughout the transaction process helping achieve the best possible outcome at the point of the transaction and in the longer term.
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Human Capital
With expertise in visa, payroll, human capital and income tax, we adopt a multi-disciplinary and global approach to provide comprehensive solutions to businesses' most valuable asset-people.
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Corporate Finance
Growing your business profitably against a tough economic backdrop is challenging and correctly evaluating and delivering transactions is a key part of a company’s growth strategy.
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IPO Consulting
From business incubation to public stock offering, we offer a wide range of support programsservices for every stage of business development.
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International financial reporting standards (IFRS)
Our IFRS advisers can help you navigate the complexity of the Standards so you can focus your time and effort on running your business.
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Reorganizations
Grant Thornton Taiyo Inc. provides total support for corporate restructuring; aimed atto responding to dramatic changes in the management environment.
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Corporate governance and risk management
Helping you balance risk and opportunity
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Forensic and investigation services
Rapid and customised approach to investigations and dispute resolution
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Market research
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Strategy
We can support you throughout the transaction process – helping achieve the best possible outcome at the point of the transaction and in the longer term..
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China Business and Tax Advisory Services
We take the worry out of doing business in China, working closely with Grant Thornton member firms and other professional accounting firms in China.
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Business Process Re-engineering
Growing your business profitably against a tough economic backdrop is challenging and correctly evaluating and delivering transactions is a key part of a company’s growth strategy.

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In December 2024, The Japan National Tax Agency (NTA) has recently issued an update correction to Form of Statement Concerning Foreign Tax Credit for an individual resident taxpayer for 2022 calendar year and thereafter. This correction is concerning foreign income taxes on distribution of collective investment trust income.
1. Understanding Japan’s Foreign Tax Credit System
Japan’s tax system is designed to mitigate the double taxation of income that might otherwise be taxed both in Japan and in another country. The foreign tax credit is a critical component of this system, providing relief by crediting foreign taxes paid against Japanese tax liabilities. If a resident is subject to foreign income taxes under the laws and regulations of a foreign country with respect to foreign source income, the resident shall, for the purpose of preventing international double taxation, credit the creditable foreign income tax against his/her income tax amount for the year up to the maximum credit amount specified by law. The maximum creditable amount of income tax for the year is stipulated by law.
2. Adjusted Foreign Tax Equivalent Credit at the Time of Distribution
Where a collective investment trust owns foreign company’s stocks or bonds and dividend income or interest income are subject to foreign income taxes, the collective investment trust deducts the foreign income taxes from Japan withholding income taxes on distributions the collective investment trust makes to eliminate double taxation. A resident taxpayer is allowed to credit the foreign income taxes the collective investment trust deducted from the Japan withholding income taxes on distributions against his or her income tax amount when files personal income tax return subject to limitation to settle double taxation properly. This tax credit system was implemented in 2018 Tax Reform.
3. Incorrect form of “Statement of Foreign Tax Credit
The error discovered in the Calculation of Tax Credit Limit section of the detail sheet involved incorrect instructions for calculating the base amounts used in determining tax credits. Previously, the forms guided taxpayers to use income tax amount before deducting Adjusted Foreign Tax Equivalent Credit at the Time of Distribution , which could result in incorrectly high claims for tax credits. The correct procedure, as clarified in the updated form, requires taxpayers to calculate the creditable limit using income tax amount after deducting Adjusted Foreign Tax Equivalent Credit at the Time of Distribution . This ensures that the calculations align accurately with the tax laws, preventing discrepancies in tax payments. Details of update is as below:
- Error in the section Calculation of the Tax Credit Limit for Income Tax and Special Reconstruction Income Tax on the Foreign Tax Credit Detail Sheet (for Residents) (for fiscal year Reiwa 2 and beyond).
- The section describes incorrect and correct content for documenting the "Income Tax Amount「所得税額」(①) and "Special Reconstruction Income Tax Amount"「復興特別所得税額」 (②) fields. The explanation concerns the instructions on the back of the form detailing how these amounts should be recorded.
- Below table outlines the errors and the correct methods for filling out specific fields related to income tax amounts on the Japanese tax form, especially when adjustments are needed due to specific tax credits.
4. Impact and Corrective Actions by the NTA
The NTA has acted swiftly to address this issue by revising the affected forms and updating the related software systems to prevent similar errors in the future. These corrections are crucial not only for maintaining the integrity of the tax system but also for ensuring that businesses can rely on the provided documentation to accurately compute their tax obligations.
5. Implementation and Compliance
The revised forms were made available as of December 6, Reiwa 6 (2024), with the updates to software systems scheduled for completion by January 6, Reiwa 7 (2025). Taxpayers are encouraged to adopt these updated forms immediately to ensure compliance and to avoid errors in upcoming tax filings.
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