Kojo Jigyo First: The Case for Delaying Your Japanese Incorporation

The Step Everyone Skips

Ask around in US founder communities about starting a business in Japan, and the conversation jumps straight to choosing between a Kabushiki Kaisha and a Godo Kaisha. What rarely gets mentioned is that you may not need to incorporate at all—at least not yet. Japan's individual business registration, known as kojin jigyo (個人事業), lets a solo founder operate legally, invoice clients, and open a business bank account without the cost and ceremony of a corporate entity.

For American founders accustomed to the LLC-or-bust mentality back home, this can feel counterintuitive. But in Japan, sole proprietorship is a legitimate, fully recognized business form—one that thousands of foreign residents use every year.

What Kojin Jigyo Actually Gets You

Registering as an individual business owner is remarkably simple: a single form submitted to your local tax office, ideally within a month of starting operations. There is no notary, no capital requirement, no certified articles of incorporation, and no registration fee approaching the ¥100,000+ that even a Godo Kaisha demands.

What you gain:

• Legal invoicing ability. Clients can pay your business, and you can issue proper invoices under Japan's invoice system (the seido introduced in October 2023).
• Business expense deductions. Rent, equipment, travel, and professional fees reduce your taxable income just as they would under a corporation.
• A business bank account. Most major banks will open an individual business account with your registration slip and personal seal.
• Consumption tax registration options. Depending on your revenue, you may even qualify for simplified taxation.

For a freelancer, consultant, or solo e-commerce operator testing the Japanese market, this covers nearly everything a company would.

The Trade-Offs: Tax and Liability

The two reasons US founders eventually incorporate are taxes and liability. Both deserve honest analysis rather than reflexive caution.

Taxes. Japan's national income tax is progressive, topping out at 45% plus inhabitant tax. Corporate income tax on a small kaisha starts around 19% on the lower brackets. If your profits comfortably exceed roughly ¥8–10 million per year, the corporate route often wins on pure arithmetic, especially once you factor in salary-versus-dividend planning. Below that threshold, the difference is modest, and the simplicity of individual taxation—filed once a year on your regular tax return—frequently outweighs it.

Liability. This is the real dividing line. As a kojin jigyo, your personal assets stand behind every business obligation. A dispute with a client, an unpaid supplier, or a product liability claim reaches your savings, and potentially your home. If your business carries meaningful contractual or physical risk, incorporation is not optional bookkeeping—it is structural protection.

A Decision Framework

Work through these questions in order:

1. Do you have employees? If yes, incorporate. Social insurance and labor law obligations effectively demand a corporate structure.
2. Does your work create liability exposure—physical products, on-site services, large contractual commitments? If yes, incorporate.
3. Will you need a business visa tied to the company (Business Manager Visa)? Note that a kojin jigyo can, in specific cases, support a visa application, but a corporation is far more reliable. If your residency depends on it, incorporate.
4. Are projected annual profits above roughly ¥10 million? Run the tax comparison with an accountant; the corporate form likely pays for itself.
5. Do clients or partners expect to contract with a kaisha? Some Japanese corporates simply will not engage sole proprietors. If your pipeline requires it, incorporate.

If you answered no to all five, you have a defensible case for staying individual—and saving roughly ¥200,000–¥300,000 in first-year setup and accounting costs.

Year One: The Real Numbers

A minimal Godo Kaisha in 2025 costs approximately ¥100,000–¥150,000 in registration and notarization, plus ¥70,000–¥150,000 annually for an administrative scrivener or accountant if you outsource compliance. A kojin jigyo costs nothing to register and can be managed on your existing tax filing for as little as ¥30,000–¥50,000 in professional support.

That is real runway—money better spent on product, marketing, or simply surviving your first year. You can always incorporate later, and doing so with proven revenue makes the transition cleaner: your corporation can even purchase the business from yourself at fair value.

When Delaying Becomes a Mistake

The shortcut turns into a trap in three scenarios. First, if you sign a commercial lease or major contract as an individual, you have personally guaranteed obligations that incorporation cannot retroactively erase. Second, if you wait until you are profitable to incorporate, you lose a year of optimal tax planning. Third, if your visa status is precarious, gambling on an individual registration when a corporate entity would have satisfied Immigration is a risk no founder should take.

The honest takeaway: kojin jigyo is a bridge, not a destination, for most serious ventures. But crossing a bridge on foot before deciding to buy a car is not a failure of ambition. It is sequencing—and in Japanese business formation, sequencing is everything.