Helpful Guides

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How to calculate your tax amount in Japan

Get your free checklist on income types and tax amount calculation in Japan. A helpful insight for all expats in Japan.

Getting Incorporated in Japan

Discover a helpful guide that will explain how you can expand your business and incorporate your company in Japan.

Year-End Tax Adjustment

This outline will help you fully understand and accurately carry out this procedure by yourself

Company Profile

We prepared a little guide on the history and culture of our company for those who prefer reading papers to screen

Tax & Accounting Glossary

Tax & Accounting Glossary

Your little guide to commonly used Japanese kanji in tax & accounting area

Tax Calculator Otani Accounting Office

Tax Calculator

Free tax calculators you can use to determine your tax amount

Latest Topics Otani Accounting Office

Latest Topics

Stay up-to-date with our tax& business developments affecting foreign businesses in Japan

How to calculate your tax amount in Japan

Getting Incorporated in Japan

Fill out the form below and receive your step-by-step instructions on the Year-End Tax Adjustment Procedure.

Fill out the form below to receive a little guide on our company and its history


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  • Operating in Japan since 1983
  • Clear communication in the English language
  • No hidden extras and upfront payments

I ended up taking the services of the Otani Accounting Office because their website was great and they had good reviews online.

The OAO team was with me every step of the way, offering advice and tips to make my future tax returns even easier.

As a result, I got a fantastic return, claiming the amounts that I was entitled to.”

Stephen Heller, Project Manager at Mugen Creations LLC

Thank you for visiting our website and expressing interest in our services. At the moment, we have reached our capacity for new inquiries and are only accepting new clients through referrals from our existing retainer clients. We apologize for any inconvenience this may cause and appreciate your understanding. We will be updating our schedule in late August, so we kindly ask that you reach out to us again after September 2023.



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