I'd planned this trip for three years. Literally — I had a folder on my desktop called Japan Road Trip 2025 dating back to late 2022. The ryokans in Kyoto were booked. The mountain route through Tohoku was mapped. My Japanese driving playlist existed. I was ready.
What I didn't have — standing at the Nissan Rent-a-Car counter at Narita Airport with two huge bags and a full-price reservation — was an International Driving Permit.
The Moment Everything Nearly Collapsed
The agent at the counter was polite but firm. "I need your international license." I showed him my California driver's license. He shook his head, smiled apologetically, and repeated: "International Driving Permit — do you have one?" I didn't even fully understand what he meant. I googled it right there at the counter, bags at my feet, the queue building behind me.
Japan is one of the strictest countries in the world on this. Not only is an IDP legally required — they only accept permits issued under the 1949 Geneva Convention, not the 1968 Vienna Convention. Other countries accept both. Japan doesn't. If your permit isn't the right type, it doesn't matter that you have one at all.
Japan only accepts IDPs issued under the 1949 Geneva Convention on Road Traffic. The 1968 Vienna Convention IDP is not accepted. Always verify your permit type before traveling to Japan.
What Happened Next
I spent two hours at the airport making phone calls and checking websites. The official automobile clubs that could issue an IDP required an in-person visit — useless to me from 5,400 miles away. I called three different services. Two had multi-week waits for physical copies. One offered a digital option.
That digital option saved my trip. I found Permio, applied on my phone at the airport café, uploaded my license and a passport photo, and paid. The confirmation email came immediately. The certified digital IDP arrived by email 19 hours later — while I slept at my airport hotel overnight.
The next morning, I presented my phone screen at the same rental counter. The same agent processed my rental in four minutes.
What I Learned About Driving in Japan
Japan's roads are extraordinary — and the rules are strict. After that near-miss, I spent my hotel night reading everything I could find about Japanese road regulations. Here's what actually matters for foreign drivers:
Speed limits are seriously enforced. Japanese highway police use unmarked vehicles extensively. The standard expressway limit is 100km/h, and exceeding it in Japan isn't treated casually. I set my GPS to display speed limits at all times and never exceeded them.
Parking is a genuine puzzle. Japan has some of the strictest no-parking enforcement in the world. Many city streets have parking bans at certain hours. The blue parking meters are your friend. The coin-operated mechanical car parks (the ones that lift your car into a slot) are an experience in themselves.
ETC (Electronic Toll Collection) is worth getting. Japanese expressways are heavily tolled. Most rental cars come with an ETC device — use it. The convenience lanes are much faster and the electronic billing is simple.
GPS in English is essential. Japanese road signs use romanized names on major roads, but navigating cities without a GPS is effectively impossible. Every rental car has a built-in Japanese GPS — upgrade to the English model, or use a dedicated navigation app. Google Maps works extremely well in Japan and handles toll routes properly.
Yes. An International Driving Permit is legally required for all foreign drivers in Japan. It must be the 1949 Geneva Convention type. Your US license alone will not be accepted at any car rental counter in Japan, regardless of company or location.
The Road Trip That Was Almost Not
I drove 2,100 kilometers over 14 days. Through the mountain passes of Yamagata, along the coast of the Sea of Japan, through the cedar forests of Nikko. I presented my IDP four times — at rental counters, at one police checkpoint on the Tohoku Expressway, and once at a rural petrol station where the owner simply wanted to check it out of curiosity.
Every time, it worked without question. The near-miss at Narita Airport became a story I told every night at dinner. The trip became everything I'd planned for three years.
But I think about that moment at the counter. Two hours of stress that cost me the first evening of my trip. A $59 document and five minutes of my time could have prevented all of it — months earlier, from my sofa in San Francisco.
1. Apply for an IDP (1949 Geneva Convention type) at least one week before departure. 2. Download offline maps for your driving route. 3. Book an ETC-equipped rental car. 4. Check if your credit card includes overseas car rental insurance. 5. Screenshot the emergency roadside number for your rental company.
Three years of planning, nearly undone by a $59 document I'd never heard of. Don't make the same mistake.