July 23, 2026Yes, U.S. military personnel can drive in Japan — but not on the license in your wallet. As SOFA-status personnel, you drive on the SOFA license (officially the USFJ Form 4EJ), the only operator's permit U.S. Forces members are authorized to use here. Your stateside license and an International Driving Permit help you qualify for it, but the 4EJ is what actually makes you legal. Most people get one within their first couple of weeks at Yokosuka or Iwakuni.
This guide covers exactly what the SOFA license is, who needs one, how to get it, how long it lasts, and the slip-ups we see most often.
To drive your own car in Japan as U.S. military personnel, you need a SOFA license (USFJ Form 4EJ) from your base. Complete your arrival briefings, pass an 80%+ written exam, and bring a valid U.S. license or IDP. It's issued for up to four years, typically covering a full tour.
Driving rules in Japan split foreigners into three groups, and only one applies to you. Getting this right on day one saves a lot of confusion.
| Your situation | What you drive on | How long it is valid |
|---|---|---|
| Tourist / short visit | International Driving Permit (1949 Geneva Convention) | Up to 1 year from entry |
| Long-term civilian resident | Converted Japanese license | Ongoing (renewable) |
| U.S. military personnel / SOFA status | SOFA license — USFJ Form 4EJ | Up to 4 years max (often a full tour) |
The takeaway: as SOFA personnel, you are not expected to convert to a full Japanese license, and you are not authorized to drive your SOFA-plated car on an IDP alone. The 4EJ is your path. (Sources: JAF; CFA Yokosuka Driver's License Office.)
A heads-up from our lot: a lot of customers arrive with an AAA International Driving Permit and assume they are set. Bring it — it helps you qualify — but do not plan to drive your car off the lot on it. You will want the 4EJ first.
The SOFA license is a driving permit issued by U.S. Forces Japan under the Status of Forces Agreement. Everyone calls it "the SOFA license," but on the form, it is the USFJ Form 4EJ.
Two things to know up front:
It is base-issued, not issued by a Japanese DMV. Your installation's license office handles it.
Once you hold it, Japan treats you as a professional driver. Keep it current and carry it every time you drive — that is the expectation, not just a suggestion.
You need a USFJ Form 4EJ if you are SOFA-status and want to drive in Japan. That covers:
Active-duty service members
DoD civilian employees
DoD contractors (with a SOFA letter from the Staff Judge Advocate's office)
Spouses and dependents who want to drive
Sign-off matters: family members and DoD civilians need their sponsor's signature on the application, and active-duty personnel E-5 and below need a command authorization letter from their commanding officer. (Sources: U.S. Army Garrison Japan; MCCS Iwakuni Driver Education.)
The base runs the process, so Yokosuka (Navy) and Iwakuni (Marine Corps) differ in the details — but the path is the same:
Finish your arrival briefings. At Yokosuka that is the Area Orientation Brief / Intercultural Relations (AOB/ICR) plus the CFAY Safety Local Hazards Course. These come before the 4EJ.
Bring a qualifying credential. One of: a valid U.S. state/territory/D.C. license, a valid IDP, a valid Government of Japan license, a license from a country listed in USFJ Instruction 31-205, or a certificate from a formal driving course.
Pass the written exam with 80% or higher. Your base license office provides the study materials.
Complete any required driver's-ed or road test. First-time drivers or those with an expired license may need a formal course first.
Get your signatures and pick up your 4EJ.
No license, or it expired? Bases offer driver's-education programs for exactly this. Ask your installation's license office what is available for your status.
The CFAY Safety Department Driver's License Office — Building J196, by the NEX gas station and mini-mart — issues and renews the 4EJ, large government-vehicle permits, and motorcycle licenses. It cannot renew your stateside or home-country license.
Iwakuni splits the process across a few offices: MCCS Driver Education (at the Crossroads Mall complex, Bldg. 410) runs the driver's-ed courses and the written and road tests; the Provost Marshal's Office Pass & Registration section issues the SOFA license and handles vehicle registration; and the Staff Judge Advocate's office issues the SOFA status letter that contractors need. A few local specifics:
Insurance is required up front. To drive a SOFA-plated vehicle you need your 4EJ plus JCI (Japanese Compulsory Insurance) and secondary liability insurance — at least ¥30,000,000 in bodily injury and ¥3,000,000 in property damage coverage. An IDP is not accepted for SOFA-plated cars.
The written-test bar can be higher. Iwakuni's 45-hour first-time driver's course requires 90% on its classroom written exam (the SOFA exam itself is 80%).
Renewal can mean a course. If your stateside license has expired and cannot be renewed, you will need to complete a 3-hour refresher course (about $150) before your SOFA license expires in order to renew it — a step Yokosuka's document-based renewal does not require.
Younger dependents face age limits: drivers 15 and 17 may be on-base only, and new drivers 18+ may be limited to on-base driving for about 30 days before full on/off-base privileges.
Course length, fees, and exact requirements change — confirm current details with MCCS Driver Education and Pass & Registration before you go.
Your USFJ Form 4EJ is issued for a maximum of four years, based on your eligibility. That generally covers a full tour, though your actual term may be shorter. Keep these in mind:
Renew early. At Yokosuka you can renew as soon as 90 days before expiry — and it is on you to start it.
Renewal works differently by base. Yokosuka is largely a document-based renewal at the license office. At Iwakuni, if your underlying stateside license has expired and cannot be renewed, you will first need to complete a 3-hour refresher course before your SOFA license expires.
Never let it lapse. An expired 4EJ cannot be renewed — it must be reissued, possibly with the Local Hazards Course again. The lapse we see most often happens during a busy PCS window or a deployment, when the date quietly slips by. A reminder ~120 days out saves the headache.
Update after any change. New command, unit, or status? Bring the paperwork to your license office.
Spouses and eligible dependents can get a SOFA license with the sponsor's signature. For the car itself, a dependent generally registers it in the sponsor's name unless the sponsor grants a power of attorney.
Teens are a special case — expect age-based, often on-base-only restrictions at first (see the Iwakuni notes). Rules vary by base, so confirm locally before your teen drives.
Letting it expire — that is a full reissue, not a quick renewal.
Relying on an IDP for a SOFA-plated car — you need the 4EJ.
Skipping the update after a command or status change.
Driving without it on you — as a professional driver, you are expected to carry it.
No. SOFA-status personnel use the USFJ Form 4EJ instead of converting to a Japanese license.
Not as a SOFA driver. Your U.S. license helps you qualify for the 4EJ, but the 4EJ is what makes you legal here.
Tourists can use a valid 1949 Geneva Convention IDP for up to a year. SOFA personnel cannot drive a SOFA-plated vehicle on an IDP — you need the 4EJ.
Once you have finished your required briefings (AOB/ICR and the Local Hazards Course) and passed the written exam — often within your first couple of weeks.
Motorcycles need separate licensing and a safety course, handled by your base license office.
It is the standard USFJ operator's permit, but report changes in assignment to your license office and follow local base rules. Confirm specifics with your installation.
The SOFA license is step one. Step two is a reliable car that is already inspected, registered, and set up for life in Japan — so you are not juggling paperwork in a language you are still learning.
If this all feels like a lot, you are far from the first — we walk customers through it every week, and most are surprised how quickly it comes together once they know the steps. At Yoko Drive, we have helped over a thousand military families get on the road, with English-speaking support and the paperwork handled end to end. Browse our current inventory, explore our PCS and newcomer resources, learn more about us, or get in touch and we will help you find the right car for your tour.
License rules vary by base and change over time — always confirm the current process with your installation's driver's license office. This guide draws on the following official Japanese government and U.S. military sources:
CFA Yokosuka Driver's License Office — Commander, Navy Region Japan (4EJ issuance, prerequisites, renewals)
U.S. Forces Japan — USFJ vehicle and traffic policy
MCAS Iwakuni Provost Marshal's Office — Iwakuni driving, registration, and insurance requirements
MCAS Iwakuni PMO — Drive Safe Pamphlet (PDF) — Iwakuni SOFA insurance minimums (¥30M bodily injury / ¥3M property damage)
MCCS Iwakuni Driver Education — Iwakuni driver's-ed courses, exam scores, refresher/renewal, age restrictions, office locations
U.S. Army Garrison Japan — Driving & Vehicle Registration — license requirements and sign-offs
Japan Automobile Federation (JAF) — International Driving Permit and foreign-license rules
U.S. Embassy & Consulates in Japan — Driving in Japan — driving rules and license validity for U.S. citizens
This guide is for general information only and is not legal advice.
We are a used car dealership based in Yokosuka, specializing in serving military personnel with a wide range of inspected vehicles. Our Iwakuni branch also offers the same exceptional service. We provide vehicle registration and shipping options for your convenience.