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.
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.

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
- gaimen kirikae (外免切替) — foreign-to-Japanese license conversion
- knowledge confirmation test (知識確認テスト) — the 50-question test since Oct 2025
- International Driving Permit (IDP) — valid 1 year, short-term only
- regular license / honmen (本免許) — what you get after conversion
- aptitude test (適性検査) — vision & color check on test day
- Rules of the Road (交通の方法に関する教則) — the official source of every test question
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.
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
Hokkaido & Tohoku7 prefs.
Chubu (Koshinetsu, Hokuriku, Tokai)10 prefs.
Chugoku5 prefs.
Shikoku4 prefs.
Kyushu & Okinawa8 prefs.
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.)
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.













