We help businesses succeed with tax support specializing in sole proprietorships and English-language support.
Experience reliable and trustworthy tax and business support at Tenmusubi Certified Public Tax Accountants' Office.
We serve many clients, including sole proprietors and English-speaking clients (individual and corporate). We can also provide flexible services such as spot consultations, seminars, and writings to meet the needs of our clients.
Commitment to the Latest Technology02
Our firm is proactive about information technology. For example, we offer cloud accounting and electronic bookkeeping services, use web conferencing (ZOOM) to serve clients in remote locations, and are researching the use of ChatGPT in our operations.
Solid expertise and experience 03
Our principal tax accountant, Kojima, has extensive knowledge and experience in a wide range of business support services and consistently provides services such as small business sales and stock valuation of family-owned companies for a transparent fee.
Introduction of Representative Tax Accountant Akihiro Kojima
I am Akihiro Kojima, the principal tax accountant of our firm. He has a wide range of knowledge and experience in dealing with sole proprietorships, English-speaking clients (individual and corporate), and Japanese corporations. He is well versed in IT, enabling him to provide services utilizing the latest technology and English. This allows customers who are not fluent in Japanese to receive support with confidence.
We have extensive experience in back-office operations and can assist management from many angles. We strive to provide services that are more in line with your needs, without being overly technical in terminology.
We provide daily information on our blog, Twitter, and YouTube. If you have time, please take a look at our outgoing information.
Blogs & News
What are the tax consequences of selling accessories in a double business?
Taxation Debate and Vertical Equity in Retirement Benefits: The End of Salaried Employees' Preference and a New Debate
Consider the introduction of a bachelor tax.
Comparison with income tax! Why is there no year-end adjustment for inhabitant tax?
What are the taxes when an individual is comped or crowdfunded to pay for a lawsuit?
Is income received before opening a business considered business income? Some notes on tax returns.
Whether the cost of a Corona mask is a necessary expense for a sole proprietor or a deductible expense for a corporation.
Application and prior consultation
Applications for services can be found on the Introduction page of the various services. Please apply from the service page of your choice.
If you have any questions or concerns before applying, please get in touch with the following pre-consultation desk. Please note that we do not accept solicitations, sales pitches, YouTube or TikTok management on behalf of our clients or tax accountant referral agencies.
Mr. T (sole proprietor)
Mr. B (individual, English speaking)
Mr. Y (IT-related company)
Mr. L (Corporate, English speaking)
Mr. K (Manufacturing industry)
Mr. S (design office)
01 Advisory Cases for Sole Proprietors
IT Consultant Management Improvement
Our firm provided an analysis of the business situation and tax planning advice to a sole proprietorship of an IT consultant. As a result, the business's profit margin improved as a result of the cost savings and reduced tax burden.
02English Language Support (Individual) Cases
Tax support for Non-Japanese freelancers
We assisted a foreign freelance designer in filing tax returns in Japan, explaining the necessary procedures and tax-related precautions. As a result, we facilitated a smooth tax filing process.
03English Support (Corporate) Cases
Tax Preparation for Foreign Companies
We assisted a foreign company with tax planning and optimization in Japan. We also pointed out areas where international taxation was relevant and realized tax reduction measures.
04Stock valuation case
Stock Valuation of Small and Medium Enterprises
Stock price is not considered in small and medium-sized enterprises. Upon request, we calculated the stock price as a formal price, not an estimate.
05The Case of the Lecture
Tax Lecture on Electronic Bookkeeping Law Measures
The lecture included a short presentation on measures for the Electronic Bookkeeping Law, which has become a hot topic in recent years, and how it can be used to promote sales of IT equipment. Not only taxation, but also market sense was applied.
06Intermediary case of business sale
Asset optimization through business divestitures
For an individual who was considering selling his business, we assisted him in setting an appropriate price and selecting a buyer. As a result, the sale of the business proceeded smoothly, and business succession and asset optimization were realized.
07Land case of forgotten registration
Application of special provisions for real estate
We discovered a registration error on a piece of land that we wanted to dispose of. We examined the possibility of reducing the amount of tax due on the land and guided the client through the necessary procedures and steps to successfully reduce the amount of tax due.
Frequently Asked Questions
Please open this page to check.
We are a member of the "Association of Micro M&A Professionals" and aim to work with M&A professionals to provide more excellent value to our clients. Mergers and acquisitions are not only an option for business liquidation but also an option that can be taken by small and medium-sized companies that are short of successors.
We use Yayoi and Freee accounting software. In addition to installed accounting software, we employ cloud accounting software to meet the needs of our clients. We also have partnerships in labor management such as Jobcan.
In addition, we aim to cooperate with the following companies and organizations as future partners
- Accounting and labor software companies: Partnering with cloud accounting software can provide customers with more efficient accounting processes.
- Tax and labor consulting firm: We work with tax and labor professionals to provide comprehensive services to our clients.
- Management consulting firm: we will work with business strategy and marketing experts to help our clients grow their businesses. We will also cooperate with M&A related to business succession.
- International tax and law firms: provide expertise in foreign tax and legal systems to clients with international operations.
For partnership information, please get in touch with us at
→ Make a "Partnership Inquiry
Please note that we do not accept solicitations or sales pitches.