Renting an apartment in Japan is one of the most stressful milestones for any foreigner settling here long-term. I’ve watched friends nearly lose their ideal apartments — and their sanity — because nobody explained the guarantor system Japan requires before they started their search. If you’ve already been told you need a hoshounin (保証人) and have no idea what that means, you’re in exactly the right place.
This guide breaks down how Japan’s guarantor system works, what alternatives exist, and how to protect yourself from the mistakes that trip up even well-prepared expats.
What Is the Guarantor System in Japan?
In Japan, most landlords require tenants to provide a hoshounin (保証人) — a personal guarantor — before signing a lease. This is someone who legally agrees to cover your rent, repair costs, and any other financial obligations if you default. It’s not a reference letter. It’s a binding financial commitment.
Historically, this role was filled by a Japanese family member, often a parent or sibling. For foreigners without Japanese family ties, that creates an immediate wall. I’ve seen this knock people back weeks into an apartment search, sometimes forcing them into overpriced foreigner-friendly share houses simply because they had no one to ask.
The system exists because Japanese tenancy law has traditionally made it difficult for landlords to evict non-paying tenants quickly. The guarantor was the landlord’s insurance policy.
The Two Types of Guarantors You’ll Encounter
Personal Guarantor (Kojin Hoshounin)
A kojin hoshounin (個人保証人) is an individual — typically a Japanese national with a stable income — who personally backs your lease. Most landlords require this person to earn at least 3 times the monthly rent and be under 60 to 65 years old (requirements vary by property management company).
Finding a Japanese national willing to take on that liability is genuinely hard for most foreigners. Your company’s HR department is often the best first call — many Japanese employers will act as a personal guarantor for foreign employees, especially at larger firms.
Institutional Guarantor (Hoshougaisha)
This is where things have changed significantly for the better. A hoshougaisha (保証会社) is a professional guarantor company that acts as your financial backer for a fee. You pay them — typically 0.5 to 1 month’s rent upfront, plus an annual renewal fee of around ¥10,000 to ¥20,000 — and they cover the landlord’s risk.
As of 2026, the vast majority of rental properties in Tokyo and other major cities now work with institutional guarantors rather than requiring a personal one. This has been a genuine game-changer for the foreign renter experience.
How the Application Process Works
Here’s the practical flow you’ll go through when renting with an institutional guarantor:
Step 1 — Choose your apartment. Your real estate agent (fudousan-ya) will tell you which guarantor company the landlord works with. You don’t usually choose — the company is pre-selected.
Step 2 — Submit your application. You’ll need your Residence Card (Zairyu Card), proof of income (employment contract or pay stubs), and your passport. Some companies also request your My Number (個人番号) card.
Step 3 — Credit screening. The guarantor company runs a screening, typically taking 1 to 3 business days. Approval rates for employed foreigners on valid visas are generally good.
Step 4 — Pay the guarantor fee. This is paid at contract signing, separate from your key money (reikin) and deposit (shikikin).
Step 5 — Sign the lease. Once the guarantor company approves you, the landlord will proceed with the contract.
One thing I always tell people: read the guarantor company’s terms carefully. Some have clauses that allow them to enter your apartment for inventory checks if you fall behind on rent. It’s worth knowing that before you sign.
What Changed: The 2020 Civil Code Reform
This is something many foreigners — and honestly, some real estate agents — aren’t fully across. Japan’s revised Civil Code, which came into effect in April 2020, introduced a legal cap on personal guarantor liability. According to the Ministry of Justice (法務省), personal guarantor contracts must now specify a maximum liability amount (gokudogaku) — contracts without this cap are legally void.
This was a major protection for guarantors, and it nudged more of the market toward institutional guarantors who operate under different rules. If you do find someone willing to be your personal guarantor, make sure their contract includes this cap clearly stated in writing.
What Foreigners Often Get Wrong
Assuming a personal guarantor is always required. Many foreigners walk into apartment searches believing they’ll be rejected outright because they can’t provide a Japanese family member. In 2026, this is largely outdated thinking. Most Tokyo properties route through institutional guarantor companies, and a foreigner with a stable job and valid visa is a perfectly acceptable applicant.
Not budgeting for the guarantor fee upfront. Move-in costs in Japan are notoriously high. I’ve seen people carefully budget for key money and deposit but overlook the guarantor fee entirely. On a ¥100,000/month apartment, you’re looking at an extra ¥50,000 to ¥100,000 at signing — not a small surprise.
Ignoring renewal fees. The initial fee gets all the attention, but the annual renewal fee of roughly ¥10,000 to ¥20,000 per year adds up over a multi-year lease. Factor it into your long-term housing budget.
Using guarantor services not approved by the landlord. Some foreigners try to organize their own guarantor arrangements. If the landlord has a designated guarantor company, you must use them — alternatives are typically not accepted.
FAQ
Can I rent in Japan without any guarantor?
It’s rare but possible. Some properties — particularly in buildings with higher foreigner acceptance rates or managed by companies like Sakura House or Leopalace21 — may waive the requirement. Public housing (UR housing) also doesn’t require a guarantor, which makes it worth exploring.
What if I’m self-employed or freelance?
You’ll need to provide stronger proof of income, typically 2 to 3 years of tax returns (kakutei shinkoku). Institutional guarantor companies do screen freelancers, but approval is less automatic — having a larger deposit offer ready can help.
Does my visa type affect guarantor approval?
Yes. Long-term visas (Spouse Visa, Work Visa, Permanent Residency) are viewed most favorably. Short-term or student visas may face more scrutiny. As of 2026, there’s no official discrimination in the law, but screening practices vary by company.
Related Articles
If you’re in the middle of an apartment search, you’ll want to read our guide on renting an apartment in Japan as a foreigner, which walks through the full process from finding a real estate agent to signing day.
Understanding move-in costs is equally essential — our breakdown of key money, deposits, and agency fees in Japan will help you budget accurately and avoid surprises.
Many readers also find our article on UR housing in Japan useful at this stage, especially if you want a no-guarantor, no-key-money option worth seriously considering.
Conclusion
Japan’s guarantor system is one of those things that sounds more intimidating than it actually is — once you understand how it works. In my experience supporting expats through the rental process in Tokyo, the foreigners who struggle most are the ones who go in without understanding what they’re being asked to sign, not the ones who lack a Japanese guarantor.
The institutional guarantor system has genuinely opened up the rental market here. If you have a stable job, a valid visa, and your documents in order, you’re a reasonable candidate for most apartments.
My honest recommendation: go in prepared, budget for the full move-in cost including guarantor fees, and don’t hesitate to ask your real estate agent which guarantor company is being used before you fall in love with a property. A little upfront clarity saves a lot of frustration later.
Ready to start your apartment search? Download our free move-in cost checklist and take the guesswork out of budgeting for your first Japanese rental.
