Your Japan visa can be rejected for one small mistake—even if you think you are working legally.
Many students and dependent visa holders in Japan are already making this mistake.
They are working hard, following their routine… but still breaking immigration law without realizing it.
And the problem is—
by the time they understand it, it is already too late.
The Rule You Cannot Ignore
If you are on a Student Visa or Dependent Visa, you are allowed to work a maximum of 28 hours per week.
This is not a suggestion.
👉 This is a strict immigration rule.
But most people misunderstand one thing.
They think:
- “I worked less this week”
- “I will work more next week”
- “At the end of the month it balances out”
👉 This thinking is wrong and dangerous.
How Japan Actually Calculates Your Work Hours
Japan does not calculate by calendar week.
It uses a rolling 7-day system.
That means:
👉 From any day you start counting, the next 7 days must stay within 28 hours.
Simple Example (Very Important)
Let’s say:
You worked 28 hours from Tuesday to Sunday
Then you worked 4 hours on Monday
👉 Looks normal, right?
But if you count the last 7 days:
👉 Total = 32 hours
👉 This is a violation of immigration law
When Can You Work More?
- During school period → Max 28 hours/week
- During long vacations (summer/winter) → Up to 40 hours/week
👉 But Dependent Visa holders:
❌ Always limited to 28 hours (no exception)
The Hidden Danger Most People Ignore
Many students work extra hours in cash.
They think:
👉 “No record, no problem”
But here is the risk:
👉 If your company reports your income to tax authorities (申告)
👉 Immigration can see everything
Sometimes companies do this without informing you.
I personally know cases where people are now facing visa problems because of this.
Most people focus only on earning, but they don’t understand where their money is going.
That’s why, even working legally, many still struggle financially.
Read: Why You Can’t Save Money in Japan (Even With a Job)
Another Serious Mistake
On Student or Dependent Visa, you are NOT allowed to work in:
- Night clubs
- Bars
- Pachinko
- Entertainment businesses
👉 Working in these places = direct violation
What Happens If You Break the Rule?
- Your visa renewal may be rejected
- Your future visa may be denied
- Your employer can be fined up to ¥3,000,000
Final Reality
In Japan, the problem is not lack of work.
The real problem is not understanding the system.
You can work hard every day, but one mistake can destroy everything you’ve built.
If You Want to Stay Safe in Japan
- Always track your weekly working hours
- Never trust “I will adjust later”
- Be careful about tax reporting
- Follow immigration rules strictly
👉 Real truth:
In Japan, working hard is not enough.
You must understand the system, or you will pay the price.
If you want a clear system on how to survive, save money, and avoid mistakes in Japan,
I created a simple guide based on real experience.
Read the full guide here:
👉 How to Survive, Save Money, and Avoid Costly Mistakes in Japan