Do I Need a Tax Accountant in Japan? A Guide for Foreign Business Owners

Hello, my name is Taisei Koshida, a certified public accountant and tax accountant in Japan.

Do you really need a tax accountant in Japan?

The answer is no — not everyone does.

If you are an employee with only salary income and your employer completes your year-end tax adjustment, your Japanese tax affairs may be quite simple. Even some sole proprietors with straightforward businesses can handle their own bookkeeping and kakutei shinkoku (確定申告).

However, the situation changes when you start a business, establish a company, earn income from overseas, own foreign assets, operate a U.S. LLC, or have several different types of income.

In those cases, the difficult part is often not entering numbers into a tax return. It is deciding how those numbers should be treated under the Japanese tax system.

In this article, I explain when you probably do not need a tax accountant, when professional support becomes useful, and what an English-speaking tax accountant in Japan can actually do for you.

1. When You Probably Do Not Need a Tax Accountant in Japan

Not everyone living or doing business in Japan needs a tax accountant.

If you are an employee, receive salary from only a Japanese employer, and your tax is properly handled through withholding and a year-end tax adjustment, you may have little or no need to file a separate income tax return.

Even if you need to file a tax return, you may be able to prepare it yourself if your situation is simple and you are comfortable using the Japanese tax system.

The same applies to some small sole proprietors, such as someone who has only a small amount of rental income from a property. If your business has only a limited number of transactions, no employees, no overseas income, and straightforward expenses, bookkeeping and filing a tax return may be manageable without professional accounting services.

I do not think people should pay a tax accountant to do something they can comfortably and correctly do themselves.

The question is not simply, “Do I need a tax accountant?”

A better question is, “At what point does the time, complexity, or tax risk make professional help worthwhile?”

2. When a Tax Accountant Becomes Useful

A tax accountant becomes more useful when your tax return requires judgment rather than simply calculation.

For example, professional advice may be particularly useful if:

• You have started a business in Japan.
• You have established a Japanese company.
• You receive income from both Japan and another country.
• You have several types of income.
• You own rental property overseas.
• You are planning to start investing in real estate in Japan.
• You have capital gains or dividend income from securities held overseas.
• You receive income or distributions from an IRA or 401(k).
• You are considering converting a Traditional IRA to a Roth IRA.
• You operate a foreign company or U.S. LLC while living in Japan.
• You are unsure whether an expense is deductible.
• You need to deal with consumption tax or Japanese payroll.
• You have received an inquiry or tax audit notice from the Japanese tax office.
• You are not sure whether foreign tax credits or remittance-based taxation apply to you.

In these situations, preparing the final tax return is only one part of the work.

The more important questions may be how the income should be classified, when it should be recognized, whether it is Japan-source or foreign-source income, whether a tax treaty applies, and what documents should be retained.

These decisions can affect the tax calculation long before the tax return itself is prepared.

3. Starting a Business or Company in Japan

Accounting in Japan becomes more important when you start operating a business rather than simply earning a salary.

For a sole proprietor, this can include bookkeeping, classifying business expenses, filing a blue return application, calculating depreciation, and preparing the annual income tax return.

For a company, there are additional matters such as corporate tax returns, consumption tax, director’s compensation, payroll, withholding tax, and year-end adjustment procedures.

Some decisions also need to be made early. For example, the timing and amount of director’s compensation can have important tax consequences and cannot always be freely changed later in the fiscal year.

Good accounting for entrepreneurs is therefore not only about preparing a tax return after the year has ended. It is also about setting up the accounting and tax procedures correctly while the business is operating.

For small businesses, getting the basic structure right from the beginning can be more valuable than trying to correct everything at the end of the year.

If you are planning to establish a company in Japan, see:

Starting a Company in Japan: 3 Essential Tax Steps for Foreign Entrepreneurs

4. Foreign Income and International Tax Issues

International tax and accounting in Japan can become considerably more complicated than a domestic tax return.

Living in Japan does not mean that only income paid into a Japanese bank account matters.

Depending on your tax residency status, Japan may tax income earned or paid outside Japan as well. For a non-permanent resident, the treatment of foreign-source income may also depend on whether income is paid in Japan or remitted to Japan.

Foreign tax credits can become important when the same income is taxed in both Japan and another country.

This means that an international tax accountant in Japan may need to look beyond the Japanese tax return itself. The accountant may need to understand where the income arose, when it was earned, where it was paid, whether money was remitted to Japan, what foreign tax was paid, and whether a tax treaty affects the result.

For people with income or assets in more than one country, these questions can be much more important than the mechanical preparation of the tax return.

For more information about international taxation in Japan, see:

Moving to Japan? How Your U.S. Income Is Taxed in Japan

Foreign Tax Credit for Non-Permanent Residents in Japan

How to Prepare a Japanese Tax Return for U.S. Non-Permanent Residents: Remittances, IRA, and Foreign Tax Credits

5. U.S. LLCs, IRAs, and Other Overseas Assets

For U.S. taxpayers living in Japan, the tax situation can become particularly complicated.

For example, a U.S. LLC may receive pass-through treatment for U.S. federal tax purposes, but that does not automatically mean that Japan will treat the entity or its income in the same way.

Traditional IRAs, Roth IRAs, IRA conversions, dividends, capital gains, and other investment income can also require consideration under Japanese tax rules.

Another issue is remittance-based taxation for a U.S. non-permanent resident in Japan. The source of the income, timing of the income, foreign taxes paid, and remittances to Japan may all need to be considered.

This is a good example of why simply copying the treatment used on a U.S. tax return may not produce the correct Japanese tax result.

When two countries are involved, the starting point should be to determine the Japanese tax treatment independently and then consider how double taxation can be relieved, including through an applicable foreign tax credit or tax treaty.

6. Accounting, Payroll, and Ongoing Tax Support

Some clients need help only once a year with a tax return. Others need ongoing accounting and tax support.

For a small business in Japan, ongoing support may include:

• Bookkeeping and accounting
• Monthly review of financial results
• Payroll services
• Withholding tax procedures
• Year-end adjustments
• Corporate or individual tax returns
• Consumption tax returns
• Tax planning
• Communication with the Japanese tax office

An accounting and payroll service in Japan can be particularly useful for foreign business owners who can manage their business in English but do not want to handle Japanese tax notices, forms, and administrative procedures themselves.

The appropriate level of professional accounting service depends on the business.

A small company with a few transactions may not need the same level of support as a company with employees, payroll, overseas transactions, consumption tax obligations, and multiple sources of revenue.

7. Tax Reduction and Tax Planning in Japan

Tax reduction in Japan does not simply mean finding as many expenses as possible.

Good tax planning starts with correctly understanding the business and applying the available rules to the actual situation.

For example, tax planning may involve the timing of expenses and investments, director’s compensation, depreciation, the blue return system, consumption tax, or the choice between operating as a sole proprietor and establishing a company.

For a company, corporate tax planning in Japan is most useful before transactions and decisions have already been completed. Once the fiscal year has ended, some tax-saving options may no longer be available.

The purpose of tax planning should therefore be to make legitimate decisions in advance, not to create expenses merely to reduce tax.

In my view, spending ¥1 million only to save ¥300,000 of tax does not make you ¥300,000 richer. You have still spent ¥1 million.

Tax reduction should make economic sense for the business itself.

8. How Much Support Do You Actually Need?

Using a tax accountant does not have to mean outsourcing everything.

Some business owners want their accountant to handle bookkeeping, payroll, tax returns, and communication with the tax office.

Others are comfortable doing their own bookkeeping and need professional help only with the difficult parts.

For example, you may only need someone to review your first Japanese tax return, determine the treatment of foreign income, check a U.S. LLC issue, calculate a foreign tax credit, or confirm whether a particular transaction has been recorded correctly.

I think the appropriate level of support should depend on the client, not on the accountant’s preferred package.

If you can do part of the work correctly yourself, there is not always a reason to pay someone else to do it.

9. What Should You Look for in a Tax Accountant in Japan?

If your tax situation is straightforward, many tax accountants in Japan may be able to handle it.

If you are a foreign business owner, however, there are some additional points worth considering.

First, can the accountant communicate with you clearly in a language you understand?

Second, does the accountant understand the type of income and transactions you actually have?

English support alone is not enough if your situation involves foreign companies, overseas investments, foreign tax credits, or remittance-based taxation.

Third, consider how much support you actually want.

Some clients prefer detailed monthly accounting and payroll support. Others want to maintain their own records and consult a tax accountant only when an important issue arises.

Finally, you should be comfortable asking questions.

Taxes are complicated enough even in your own country. When you are dealing with the tax system in Japan in another language, you should be able to ask why something is treated in a particular way and receive an explanation that you can understand.

10. FAQ

Related Articles

Depending on your situation, you may also find the following guides useful:

Starting a Company in Japan: 3 Essential Tax Steps for Foreign Entrepreneurs

Blue Form (Aoiro Shinkoku) in Japan: Benefits and Deadlines

Moving to Japan? How Your U.S. Income Is Taxed in Japan

How to Prepare a Japanese Tax Return for U.S. Non-Permanent Residents: Remittances, IRA, and Foreign Tax Credits

Foreign Tax Credit for Non-Permanent Residents in Japan

How Tax Audits Work in Japan: What Foreign Business Owners Should Expect

Accounting and Tax Support in Japan

Koshida Accounting and Tax Office provides accounting and tax services in Japan with English support.

We assist foreign individuals, entrepreneurs, and small business owners with accounting in Japan, kakutei shinkoku (確定申告), corporate tax returns, payroll, tax planning, and international tax matters.

Our international tax and accounting support includes issues involving overseas income and assets, U.S. LLCs, foreign tax credits, non-permanent resident taxation, and remittance-based taxation.

Some clients ask us to handle their ongoing accounting and tax procedures, while others consult us only about specific issues. We can discuss the level of support that is appropriate for your situation.

Through our network of specialists, we can also connect clients with professionals in areas such as visas, company registration, social insurance, and legal matters.

All of our accounting and tax services are available in English.

Please feel free to contact us through the inquiry form.