Side business with a work visa in Japan: checks before you start
Most work visas require permission before earning self-employed side income. What activities are allowed, what needs approval, and employer contract conflicts.
Next step
Check the latest conditions before you decide
Fees, campaigns, language support, and cancellation rules can change. Confirm the official conditions before applying.
Check your employment contract for side-business restrictionsQuick conclusion
Starting a side business while on a work visa in Japan involves two separate approvals that both need checking: whether your visa category permits self-employed or freelance activity (often requiring a Permission to Engage in Activity Other Than That Permitted, similar to the student work permission process), and whether your employer's contract allows side jobs at all. Confirm both before earning any side income - doing it "quietly" risks both your visa status and your main job.
Two separate checks, not one
| Check | Where to look | Why it is separate |
|---|---|---|
| Visa permission | Your specific residence status category, immigration rules | Determines whether the activity is legally allowed at all under your status |
| Employer contract permission | Your written employment contract's side-job/moonlighting clause | Determines whether your employer allows it, independent of visa legality |
Passing one does not mean you have passed the other - both need a clear yes before you start.
The visa question
Most standard work visas (such as Engineer/Specialist in Humanities/International Services) are tied to your specific designated employment activity. Generating separate self-employed or freelance income - consulting, selling products, running an online business - often falls outside that designated activity and may require applying for a Permission to Engage in Activity Other Than That Permitted, the same general mechanism used by students (see part-time work permission for students for how that process works, though the specifics differ for work-visa holders). Some visa categories may not permit this kind of side activity at all - confirm your specific category's rules with immigration authorities or a qualified professional before assuming it is fine.
The employer question
Historically, many Japanese employment contracts included clauses restricting or requiring approval for side jobs (副業, fukugyo), though this has loosened at some companies in recent years as government guidance has encouraged allowing it. Read your own contract's specific clause - see employment contract checks for what to look for generally - and if it is unclear, ask HR directly rather than assuming either that it is banned or that it is fine.
Tax reporting for side income
Side business income generally needs its own tracking and often requires filing an annual tax return (kakutei shinkoku) even though your main job's taxes are withheld automatically by your employer. Start tracking income and expenses from day one rather than reconstructing records later - the basics of freelance tax obligations are covered in freelance tax basics in Japan, which apply to side income much the same as full-time freelance income.
Why this is worth getting right before starting
Unauthorized side income can be treated as a visa violation, similar in seriousness to unauthorized part-time work, with consequences ranging from renewal problems to more serious immigration outcomes in significant cases. This is not a technicality to work around quietly - if you are unsure whether your specific visa category and situation permits a planned side activity, confirm with an immigration professional before you start earning, not after you have already begun.
This is general information, not legal or immigration advice. Visa rules around side activities are specific to your category and can change - confirm your situation directly with the Immigration Services Agency or a qualified immigration professional before starting any side business.
Before you apply
- ✓Check whether your work visa category permits self-employed or freelance activity
- ✓Read your employment contract's side-business or moonlighting clause
- ✓Apply for permission to engage in activity other than that permitted if required
- ✓Track any side income separately for tax filing purposes
- ✓Confirm with an immigration professional before starting if your situation is unclear
FAQ
Can I start a side business while on a work visa in Japan?
It depends on your specific visa category and the nature of the side activity. Many standard work visas (like Engineer/Specialist in Humanities) are tied to specific employment and do not automatically permit separate self-employed or freelance income - this often requires applying for a Permission to Engage in Activity Other Than That Permitted, similar to the process for students, or may not be permitted at all depending on the category.
Does my employer need to approve a side business?
This is separate from the visa question - check your employment contract for any clause restricting side jobs or moonlighting (fukugyo), which many Japanese employers historically included, though this has become more common to allow at some companies in recent years. Both the visa permission and any employer restriction need to be satisfied independently.
What kind of side income requires visa permission?
Generally, any income-generating activity beyond your permitted employment - freelance work, selling products, consulting, running a small online business - potentially requires this permission if it falls outside your visa category's designated activity. Passive investment income (like stock dividends) is typically treated differently from active self-employed work, but confirm specifics for your situation.
What happens if I earn side income without permission?
This can be treated as a visa violation similar to unauthorized work, with consequences ranging from problems at visa renewal to more serious immigration consequences in significant or repeated cases. This is not a minor technicality - treat visa compliance for any side income as a real requirement, not optional paperwork.
How do I report side business income for tax purposes?
Side business income generally needs to be reported and may require filing kakutei shinkoku (annual tax return) even if you also have regular salary income with taxes withheld by your main employer. Keep records separately from your main employment income from the start.
Finished reading?
Take the next step while it is fresh
You now know what to check. Compare the current conditions while they are fresh in your mind, and keep a record of what you confirm.
Check your employment contract for side-business restrictionsReferences
- Immigration Services Agency of Japan - Immigration Services Agency of Japan