Yes, you can make extra money in Japan. But the way you do it matters more than how much you make.
The ALT salary is low. That’s not a complaint — it’s a structural reality built into a municipal bidding system that was never designed with your financial wellbeing in mind. If you’ve read the contract negotiation piece on this blog, you already know that squeezing a 2–3% raise out of a dispatch company is the ceiling for most people, and even that takes years of deliberate relationship-building to achieve.
So looking for income outside your main contract is a rational response to a genuine problem. The internet knows this, which is why searches for “ALT side hustle Japan” return pages of cheerful listicles: tutoring, translation, online teaching, content creation. Ten ideas. Twenty ideas. All the possibilities.
What those articles don’t tell you: the legal framework that determines whether you’re allowed to do any of it, the professional reality that can end your career even when you’re technically within the law, and what actually happened to two real instructors who tried — one of whom left Japan on his own terms, and one of whom didn’t.
That’s what this article is for.
The Legal Reality — What Your Visa Actually Allows
Before you open an Etsy shop or take on a private student, you need to understand the legal ground you’re standing on. Not the optimistic interpretation. The actual one.
Your 在留資格 (zairyū shikaku — Residence Status) as a dispatch ALT or English teacher is almost certainly 技術・人文知識・国際業務 (Gijinkoku) — the status granted for work that requires specialist knowledge or skills in a humanities or international field. Your visa permits you to do the specific work described in your application. It does not give you a general licence to earn money in Japan however you like.
Any paid activity outside that permitted scope falls under 資格外活動 (shikaku-gai katsudō — Activity Outside Permitted Scope). Doing this without authorisation is a visa violation.
The permission that changes the equation:
If you apply for 資格外活動許可 (shikaku-gai katsudō kyoka — Permission to Engage in Activity Other Than That Permitted Under the Status of Residence Previously Granted), you’re authorised to work outside your main role for up to 28 hours per week during term time, and full-time during designated holiday periods. This covers most conventional part-time employment.
Apply at your local immigration office. It’s straightforward if your main status is in good standing.
Where it gets complicated:
The 28-hour permission covers employment — receiving wages from a Japanese employer for labour. It does not neatly cover everything. Selling goods online, doing freelance work for overseas clients, running a small independent business — these fall into a different legal category, and the rules are less clearly defined.
The honest answer is that some of these activities exist in a genuine grey zone. Japanese immigration law was not written with the eBay seller or the Upwork freelancer in mind. Some legal experts argue that independent commercial activity doesn’t constitute 資格外活動 in the same sense as employment. Others disagree.
What this means practically: there are side hustles that carry real legal risk, and there are others where the risk is much lower — but nobody can hand you a guarantee. What you’re doing is making a judgment call about how much legal ambiguity you’re comfortable with.
The law has gaps. The question is whether you want to bet your visa on one.
The Two Stories — This Is What Actually Happens
Enough theory. Here are two real cases from people who were in the industry. One made it work. One didn’t. The difference is instructive.
Story A: The Quiet Winner — Pokémon Cards and eBay
He was an ALT who genuinely loved Japanese pop culture — games, anime, collectibles. At some point he noticed something that should have been obvious but wasn’t: Pokémon cards, figures, and plush toys that cost ¥2,000 in a Japanese toy shop were selling for three times that price on eBay to collectors in his home country.
So he started buying and shipping.
He used eBay and Etsy. He built up a small but steady customer base. He made real money — not life-changing, but genuinely useful. He did it entirely in his own time. His lessons didn’t suffer. His school relationships didn’t change. His dispatch company never knew.
He completed his contract, moved on to his next destination, and left Japan with a clean record and a healthier bank balance than most of his colleagues.
Why this worked:
- He never touched his working hours. The school got the same version of him on Monday morning regardless of what he shipped on Sunday afternoon.
- He operated in a space completely removed from his professional world. No students, no parents, no colleagues, no school community.
- He leveraged something real — genuine knowledge of a market that people in his home country couldn’t easily access themselves.
- His activity didn’t involve being employed by a Japanese entity. The legal profile was lower risk than taking a second job.
This is what a well-designed side hustle looks like. It runs quietly in the background, funds your life without disrupting your work, and nobody who matters ever has reason to care.
Story B: The Self-Inflicted Disaster — Paid Leave and a Parent Who Noticed
She was teaching at a kindergarten and she spotted a genuine gap in the local market: the area had real demand for English lessons for children and adults, and the municipal government was actively looking for external instructors. She registered as an outside instructor for the city’s programme.
Up to this point, the story is defensible. The problems started when her city schedule and her kindergarten schedule began to overlap.
Her solution: use paid leave from the kindergarten to cover the days she was teaching for the city. She was getting paid twice — once from the leave she was taking, once from the city lesson she was delivering.
One afternoon, a parent of a child at her kindergarten attended one of the city’s English lessons. There was the teacher — the one who had been absent from the kindergarten that morning due to, presumably, illness or personal circumstances — standing at the front of a classroom teaching English to strangers.
The parent reported it to the kindergarten. The kindergarten raised it with the dispatch company.
The legal outcome: The dispatch company’s contract contained no explicit clause prohibiting side employment. There was no clean contractual basis for immediate termination. Technically, she wasn’t fired.
The actual outcome: The kindergarten no longer trusted her. The dispatch company’s opinion of her had changed permanently. The professional environment became untenable. She did not have her contract renewed at the end of that year.
The contract didn’t end her time in the industry. The trust did.
Legal: safe. Professional: finished.
The Real Rule — It’s Not About the Contract, It’s About the Trust
Let’s be direct about what Story B actually demonstrates.
A lot of foreign workers in Japan operate under the assumption that if the contract doesn’t explicitly forbid something, they’re free to do it. This is a Western legal intuition — the idea that what isn’t prohibited is permitted. It’s not wrong as a legal principle. It is badly wrong as a career strategy in Japan.
Japanese professional environments, and especially school communities, operate on a foundation of 信頼 (shinrai — trust). That trust is not documented anywhere. It doesn’t show up in your contract. But it is the actual currency your career runs on. The moment the school, the parents, or the community feel that they’ve been misled — even if no rule was technically broken — the relationship is damaged in a way that paperwork cannot fix.
The fact that she used paid sick or personal leave to work a second job didn’t just create a contractual problem. It created a story. And stories travel fast in small communities.
Before you start anything, run it through this checklist — not as a legal compliance exercise, but as a professional honesty check:
□ Does this side hustle require a single minute of my contracted work time?
□ Does it involve anyone connected to my school — students, parents, colleagues?
□ Am I using paid leave from my main employer to do it?
□ If my school principal found out tomorrow, would I have a coherent explanation
that didn't involve lying?
□ If my dispatch company found out tomorrow, would I feel comfortable
having that conversation?If any of these boxes makes you hesitate, the problem isn’t the side hustle itself. The problem is the design. Fix the design, or don’t do it.
There is no side hustle worth your professional reputation in an industry where the community is smaller than you think and word travels faster than you expect.
The Hustles That Actually Work (And Why)
With that framework in place, here are the categories of side income that have the most realistic profile — legally and professionally — for ALTs in Japan.
The Lowest-Risk Category: Physical and Digital Exports
What it looks like: Buying Japanese goods and reselling them to international buyers via platforms like eBay, Etsy, or Mercari Global. Or creating digital products — lesson templates, educational materials, illustrations, stock photos — and selling them through platforms like Gumroad, Creative Market, or Teachers Pay Teachers.
Why it works: You’re not being employed by a Japanese company. Your activity doesn’t intersect with your professional world. You control the hours entirely. The legal profile is lower risk than any form of employment.
The realistic upside: A well-run resale operation targeting a genuine price gap (Japanese collectibles, stationery, specialty food items, traditional craft goods) can generate meaningful supplemental income. The startup cost is low. The skills required are basic logistics and customer communication — things any competent adult can learn.
One genuine consideration: If you’re receiving payments from international platforms in foreign currencies, think carefully about how that money reaches you. Bank international transfers come with exchange fees and poor rates that quietly erode your margin. Wise gives you local account details in multiple currencies — meaning your eBay or Etsy payouts can land directly without unnecessary conversion losses. For a side hustle where margins matter, the difference adds up.
The Medium-Risk Category: Online Freelance Work
What it looks like: Writing, editing, translation, graphic design, or tutoring through international freelance platforms like Upwork, Fiverr, or iTalki. The key distinction is that your clients are overseas and the platform is not Japanese.
Why it’s viable: The employment relationship — to the extent there is one — is with a foreign entity. The 28-hour restriction on 資格外活動 is primarily aimed at domestic employment. Many immigration lawyers treat overseas freelance income differently, though this is not a universal position and you should not treat it as settled law.
The honest caveat: If you are earning regular income from Japanese private students through an online platform, the picture changes. You are effectively running an English tutoring service in Japan, which sits much closer to the regulated zone. The platform being “online” doesn’t move the activity offshore if the students and the money are in Japan.
The Category to Approach With Caution: English Tutoring in Japan
What it looks like: Private lessons for Japanese students or adults, either in person or online.
Why it’s complicated: This is the same activity you’re already permitted to do professionally. Taking private students outside your main role — without 資格外活動許可, or beyond its 28-hour limit — is a clear violation. With the permission in place and within the time limit, it’s technically legal. But it’s also the category most likely to create the kind of Story B overlap problem, especially if you’re working in the same geographic community as your school placement.
The risk isn’t just legal. It’s the parent who attends your private lesson. It’s the colleague who mentions they heard you’re doing private tutoring on weekends. It’s the school that starts to wonder whether your energy is divided.
If you pursue this route, keep it clearly separated — different community, different age group, different context — and stay well within permitted hours.
The Tax Problem Nobody Mentions Until It’s Too Late
You’ve set up the side hustle. Money is coming in. Here’s the part that blindsides almost everyone.
In Japan, any income outside your main employment that exceeds ¥200,000 per year must be reported through 確定申告 (kakutei shinkoku — Final Tax Return). This is the self-assessment tax filing that happens every February and March for the previous year’s income.
If you’re working as a dispatch ALT, your main income is handled through 年末調整 (nenmatsu chōsei — Year-End Tax Adjustment) by your employer. You don’t file a personal tax return for that income — your company does it for you. The moment you have significant income from a side hustle operating under a 請負契約 (ukeoi keiyaku — Independent Contract) arrangement — which is exactly what Etsy sales, eBay exports, or freelance work looks like — you step outside the year-end adjustment system entirely.
You are now responsible for filing your own taxes. Nobody is going to remind you.
Why this matters beyond the obvious:
When you apply for your visa renewal, immigration will ask for your 納税証明書 (nōzei shōmeisho — Tax Payment Certificate) and your 課税証明書 (kazei shōmeisho — Certificate of Taxable Income). These documents come from your local municipal office and reflect what’s on record with the tax authority.
If you’ve been earning side income and not declaring it, those certificates may not reflect your actual income — or worse, may flag inconsistencies that immigration officers are trained to notice. This is not a theoretical risk. It is how people in otherwise straightforward situations create problems for themselves at the renewal counter.
The income from your side hustle falls under 雑所得 (zatsu shotoku — Miscellaneous Income) in Japanese tax classification. Track it. Report it. File in February or March. The tax office in your municipality has English-language support materials, and the process — while unfamiliar the first time — is manageable.
You made an extra ¥300,000 last year. File your taxes. Your future self, standing at the immigration counter with a clean certificate, will thank you.
The One Question to Ask Before You Start
Everything in this article reduces to a single filter. Before you commit to any side income activity, ask yourself:
“If my school principal found out I was doing this tomorrow, would I still have a job I’m proud of?”
If the answer is yes — the activity is in your own time, it doesn’t touch your professional world, it’s legally defensible, and you’ve kept your tax affairs in order — then go ahead. Build it carefully. Keep it quiet. Make it work.
If the answer is no, or even maybe, the problem isn’t the idea. It’s the execution. Redesign it until the answer is yes, or find a different hustle.
One Last Thing
The ALT salary structure isn’t changing because you deserve better. You already know that. What can change is how intelligently you use the time and advantages you actually have.
You are a native English speaker living in a country with an enormous appetite for English content, English goods, and English expertise. You have access to products, platforms, and markets that your colleagues back home don’t. You have weekends, evenings, and the mental bandwidth of someone who isn’t managing a mortgage or a decade of career obligations yet.
One instructor turned a genuine hobby into a quiet export business and left Japan exactly when he chose to. Another let a scheduling conflict unravel two years of professional goodwill in a single afternoon.
The difference wasn’t ambition. It wasn’t luck. It was judgment.
Build something that runs in the background, pays you quietly, and gives the school the same focused professional on Monday morning that they hired. That’s the version of this that actually works.
our visa is the foundation everything else sits on. If you haven’t read How to Extend Your Visa as an English Teacher in Japan yet, do that first — because no side hustle is worth the risk of getting the visa piece wrong.
The cleaner approach to earning more is still negotiating your main contract upward: How to Negotiate Your ALT Contract — what actually moves the needle in the dispatch system.
When you’re eventually ready to leave Japan: Japan Pension Refund for Foreign Teachers — and how to use Wise to bring all of it home without losing money on the transfer.
The practical side of living in Japan is a project in itself. Download the free Japan First 30 Days Checklist to make sure nothing falls through the cracks before or after you land. Enter your email and I will send it to you now.
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