MenkyoQuest
FOREIGN LICENSE CONVERSION · 外免切替

Convert Your Foreign License
Into a Japanese One

If you live in Japan and hold a valid foreign driver's license, you can convert it into a Japanese license through a process called gaimen kirikae (外免切替). This guide covers the documents you'll need, the new 50-question knowledge test (since October 2025), and how to find the right driver's license center in all 47 prefectures.

DON'T HAVE A FOREIGN LICENSE?

If you've never held any driver's license — or you only have an international permit and want to learn the Japanese system from scratch — see the full Japanese license acquisition guide instead. It walks through driving-school selection, provisional license, and the full-license test in 8 steps.

4-panel comic — Hikari: I already have a license from my home country — do I have to start a Japanese one from zero? Yui: Nope! If you live in Japan with a valid foreign license, you can convert it through gaimen kirikae — usually just document screening, a knowledge test, and a short practical test. Hikari: A knowledge test? How tough is that? Yui: It's 50 questions, and since October 2025 you need 90% to pass — so a bit of prep really pays off. This page covers the documents and how to find your license center in all 47 prefectures. Hikari: Got it — gather the documents and brush up for the test, then book my center. Yui: Exactly! Pick your prefecture below for the local details, and you're on your way ✨
Hikari: I already have a license from my home country — do I have to start a Japanese one from zero? Yui: Nope! If you live in Japan with a valid foreign license, you can convert it through gaimen kirikae — usually just document screening, a knowledge test, and a short practical test. Hikari: A knowledge test? How tough is that? Yui: It's 50 questions, and since October 2025 you need 90% to pass — so a bit of prep really pays off. This page covers the documents and how to find your license center in all 47 prefectures. Hikari: Got it — gather the documents and brush up for the test, then book my center. Yui: Exactly! Pick your prefecture below for the local details, and you're on your way ✨
📋 KNOWLEDGE TEST AT A GLANCE

Since October 2025, the foreign-license-conversion (gaimen kirikae) written knowledge test in Japan is:

Questions
50 true/false (○✕) questions
Passing score
45 out of 50 correct (90%)
Time limit
About 30 minutes
Languages
20 languages (English, Chinese, Vietnamese, Tagalog, Nepali, Indonesian, Portuguese, Spanish, etc.)
Topics
Traffic signs, road rules, expressways, emergencies, vehicle operation
Retake
Allowed if you fail
Also required
A practical (driving) test + document screening

The test got significantly harder in October 2025 — it changed from 10 illustrated questions (70% to pass) to 50 written questions (90% to pass). MenkyoQuest’s free, AI-explained English practice test is built for exactly this format.

See the full document checklist · What changed in October 2025

📖 THE GUIDE · 14 ILLUSTRATED CHAPTERS
CH.1 🔤
Key terms, in plain English
Gaimen kirikae, jūminhyō, karimen, honmen — the few Japanese words you need before you start.
CH.2 🔑
Are you eligible to convert?
The 3-month and 1-year rules that decide whether you can do gaimen kirikae at all.
CH.3 📋
What documents do you need?
The full gaimen kirikae document checklist, common mistakes, and where to get each item.
CH.4 ✍️
Get your license translated
You need an OFFICIAL Japanese translation (JAF, embassy, or authorized firm) — a DIY one won't work.
CH.5 📍
Find your license center
You apply in the prefecture where you're registered — how to find your center, booking, and English support.
CH.6 📞
How to book your appointment
The test is by appointment only — phone or online by prefecture, and busy centers book out for weeks.
CH.7 💴
What does it cost?
Fees are paid at the center, usually cash only, vary by prefecture, and each retake costs again.
CH.8 🌏
Which countries skip the test?
29 countries/regions are exempt from the knowledge and practical tests — is yours one of them?
CH.9 🔄
What changed in October 2025?
The test went from 10 illustrated questions (70%) to 50 written questions (90%) — here's what's different.
CH.10 🗓️
What happens on test day?
The step-by-step flow at the license center: document screening, the knowledge test, and the practical driving test.
CH.11 👁️
The aptitude test (eye & color)
A quick vision, color, and hearing check before the knowledge test — bring your glasses!
CH.12 🚗
The practical driving test
A closed-course test that rewards safety checks and deliberate driving over speed — what examiners watch for.
CH.13 🌐
Can you take the test in English?
The test is offered in 20 languages, but only 4 prefectures have full English page support — here's the breakdown.
CH.14 🎉
After you pass: what's next?
When you get the card, that it's a full Japanese license, and the renewal date you should never forget.
KEY TERMS — quick links to the glossary
PRACTICE TEST · 50 Q · 90% LINE
Try the 50-question practice test →

Same format as the real knowledge confirmation test: 50 random questions from the in-scope chapters, graded against the 90% pass line. Free, no sign-up.

FIND YOUR PREFECTURE · 47 PAGES

Each prefecture handles applications at its own driver's license center. Click your prefecture for test center address, reservation method, English-support status, and the official police page.

English support across 47 prefectures: ✅ Full 4 · 🟡 Partial 6 · ❌ None 37

FAQ

Frequently Asked Questions

How many questions is the gaimen kirikae knowledge test and what is the passing score?

Since October 2025, the foreign-license-conversion (gaimen kirikae) written knowledge test in Japan is 50 true/false (○✕) questions, and you need 45 correct out of 50 (90%) to pass. The time limit is about 30 minutes, the test is offered in 20 languages including English, and you can retake it if you fail. This is in addition to a practical driving test and document screening.

Who needs to do gaimen kirikae?

Any foreign-license holder who has become a resident of Japan and intends to drive here long-term. International Driving Permits (IDPs) are valid for only 1 year and only for short visits — if you live in Japan, you need to convert. (This 1-year IDP validity is separate from the 3-month-in-issuing-country eligibility rule in Step 1; see the timeline FAQ below.)

What's the difference between the “3 months in issuing country” rule and the “1 year” IDP rule?

Two completely separate rules that operate on different timelines: • 3 MONTHS (eligibility — BEFORE coming to Japan): To be eligible to convert your foreign license, you must have lived in the country that issued the license for at least 3 months AFTER getting the license — and BEFORE coming to Japan. This proves you actually used the license in its home country. (Step 1) • 1 YEAR (IDP validity — AFTER becoming a Japan resident): An International Driving Permit (IDP) is valid for 1 year from the date it was issued. Separately, if you register as a Japan resident (jūminhyō), you can only drive on an IDP for up to 1 year after you become a resident — even if the IDP itself hasn't expired yet. After that, you must complete gaimen kirikae to keep driving. Timeline summary: 3 months in your home country (BEFORE Japan) → travel to Japan with IDP → IDP works for up to 1 year of residency → after 1 year, conversion is mandatory.

How long does the whole process take?

Anywhere from 2 weeks to 6+ months, depending on the prefecture's backlog. Tokushima has announced a 6+-month wait. Tokyo, Osaka, and other large prefectures vary by season. Apply early.

What changed in October 2025?

The knowledge test was tightened from 10 illustrated questions (70% to pass) to 50 written questions (90% to pass). A jūminhyō (residence certificate) with your nationality, residence status, and period of stay is now mandatory.

Are there countries that skip the test?

Yes. Holders of licenses from 29 countries/regions (Germany, France, UK, Switzerland, the Netherlands, Belgium, Sweden, Spain, Italy, Portugal, Norway, Denmark, Finland, Iceland, Ireland, Greece, Austria, Czech Republic, Poland, Hungary, Slovenia, Luxembourg, Monaco, Australia, New Zealand, Canada, South Korea, Taiwan, and the United States — Ohio, Oregon, Colorado, Virginia, Hawaii, Maryland, Washington) are exempt from both the knowledge and practical tests. The US state of Indiana is partial (practical test waived, knowledge test still required). All exempt holders still need document screening.

What documents do I need?

Original foreign license, Japanese translation of that license (from JAF / embassy / authorized firm), your passport (with entry stamps showing 3+ months stay in issuing country), jūminhyō with nationality/residence status/period, application photo (3cm × 2.4cm), and your inkan/seal where applicable. Each prefecture has its own checklist — check your prefecture's page below.

What languages is the test offered in?

20 languages nationwide (standardized since June 2024): English, Spanish, Persian/Farsi, Korean, Chinese, Portuguese, Russian, Thai, Tagalog, Vietnamese, Indonesian, Khmer, Nepali, Burmese, Mongolian, Ukrainian, Sinhala, Urdu, Arabic, and Hindi.

Can I study for free?

Yes. MenkyoQuest has free AI-explained practice questions in English, based on Japan's National Police Agency's Rules of the Road (the same source the test draws from). You can start any chapter from the home page.

What if my prefecture doesn't have an English page?

Only 4 prefectures (Tokyo, Kanagawa, Gunma, Nagasaki) have full English support. 6 more have partial English content. For the remaining 37, bring a Japanese-speaking friend or hire an interpreter — police centers do not provide one. You can also use Google Translate or DeepL on the Japanese page (we link to both from each prefecture page).

Why doesn't my country's International Driving Permit (IDP) work in Japan?

Japan only recognises IDPs issued under the 1949 Geneva Convention. Holders from Vienna 1968 Convention countries (e.g. Germany, Belgium, Switzerland, China mainland, Taiwan) cannot drive in Japan on an IDP — you must complete gaimen kirikae instead. Bring a JAF or embassy translation of your home-country licence to the prefectural police centre. Note that an IDP, even if valid, only allows driving for up to 1 year after you become a resident, so long-term residents from Geneva countries also need to convert. (Don't confuse this 1-year-after-residency rule with the separate 3-month-in-issuing-country eligibility rule in Step 1 — see the timeline FAQ for a side-by-side comparison.) (The IDDP — International Driving Document for People with Disabilities — has no special status in Japan; standard aptitude-test accommodations apply.)

EXAM SIMULATION · 50 Q · 90% LINE

Try the 50-question practice test

Same format as the real knowledge confirmation test (since October 2025): 50 random questions from the in-scope chapters, graded against the 90% pass line, with explanations after each answer. Free, no sign-up.

Or: practice chapter by chapter

AI-explained practice questions in English, organized into 11 chapters. Useful for working on a specific weak topic before retaking the full 50-question test above.

Source: National Police Agency, “Rules of the Road” (not subject to copyright under Article 13(2)) and each prefectural police HQ. Test-center addresses, reservation methods, and English support change frequently — always confirm on the official prefectural page (linked from each prefecture page below) before you go.

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