Rental Guarantors in Japan: Guarantor Companies and How They Work
Updated: 2026-08-26
Quick answer
Almost every rental in Japan requires a guarantor (保証人 hoshounin) — someone who agrees to cover your rent if you can't. Since newcomers rarely have a qualifying relative here, the standard path is to use a guarantor company (保証会社) instead. You apply, they check your income and identity, and once approved they stand in as your guarantor for a fee.
Think of it as a required screening step rather than an obstacle. If your paperwork is in order and the company can reach you, most applications go through. This guide walks through what a guarantor is, what the company looks at, and roughly what it costs.
Personal guarantor vs. guarantor company
A personal guarantor is an individual — traditionally a parent or close relative living in Japan with stable income — who signs to take on your rent obligation if something goes wrong. For most people arriving from abroad, that person simply doesn't exist here, and landlords are increasingly cautious about accepting overseas guarantors.
A guarantor company fills that gap professionally. Instead of leaning on a relative, you pay the company to act as your guarantor. Many landlords and agencies now require this even if you do have someone who could vouch for you, so it has quietly become the default rather than the exception.
What the company screens
The core check is whether you can reasonably afford the rent. Expect to show proof of income or a job offer, your employer or school details, and identification — for foreign residents that usually means your residence card and sometimes your passport. Students and job-changers can still pass; the company is weighing overall stability, not a single number.
Your visa status and how long you plan to stay also matter, since the company wants confidence the tenancy will run its course. Being honest and having documents ready in advance is the fastest way through — mismatched or missing paperwork is what slows applications down.
The emergency contact requirement
Separate from the guarantor company, most applications also ask for an emergency contact (緊急連絡先) — a real person the company or landlord can reach if they can't get hold of you. This is not the same as a guarantor and usually carries no financial obligation; it's simply a point of contact.
A friend, colleague, or acquaintance living in Japan is the typical choice. Line up who this will be before you apply, and let them know, so you're not scrambling for a name and phone number at the last moment.
How the cost is structured
Guarantor companies charge an initial fee calculated as a share of one month's rent, paid up front when you move in. On top of that, there's usually a smaller renewal fee charged once a year (or on a set cycle) for as long as you keep the guarantee active. Exact rates vary by company and by your profile, so treat any number the agency quotes as the figure that applies to you.
It's an ongoing cost worth budgeting for, not a one-time charge. When you compare apartments, ask the agency to spell out both the up-front guarantor fee and the recurring renewal so there are no surprises after you sign.
How the application actually runs
You'll typically fill in a form through the rental agency, then the guarantor company reviews it and often calls or texts you to confirm your details. Approval can come the same day or take a little longer if they need extra documents. Responding quickly to their contact keeps things moving.
Here's the practical catch: that verification reaches you by phone and SMS, usually to a Japanese number. If they can't confirm your identity or get a reply, the application stalls — so being reachable on a local line is effectively part of passing the check.
Set up a Japanese number first
Because the guarantor screening — and honestly the whole apartment hunt — runs on a Japanese phone number and reliable data, it's worth sorting your line out before you start applying. Agencies text you, the guarantor company calls to verify, and you'll want maps and translation on hand at viewings.
With your residence card, Rakuten Mobile can set you up on an eSIM in roughly five to ten minutes, often the same day, so your number is live when the forms need it. One simple unlimited plan covers the data you'll lean on, and Rakuten Link gives you free domestic calls — handy for calling agencies and taking that verification call. Clear the guarantor step with one less thing to worry about.
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