
Staying Reachable on Your Home Number While Using a Japan eSIM
How to run your eSIM and home number side by side, without missing calls or two-factor codes.
When a rental car makes sense, what paperwork you need, and what driving in Japan is actually like.

Japan's train network is so good that a lot of visitors never consider renting a car, but for specific itineraries — rural regions, national parks, and areas with limited train coverage — driving genuinely opens up parts of the country that trains don't reach easily. Here's what you actually need and when it's worth considering.
Japan requires an International Driving Permit (IDP) based on the 1949 Geneva Convention alongside your valid home driver's license to legally drive as a foreign visitor. This is a critical detail: IDPs from countries that only issue the newer 1968 Vienna Convention permit are not accepted in Japan, which has caught out travelers from certain countries who assumed any IDP would work. Check your home country's specific IDP type before your trip, and obtain it before you fly — IDPs generally cannot be arranged from within Japan and must be issued by your home country's licensing authority in advance.
For a Tokyo-Kyoto-Osaka Golden Route trip, a rental car is generally unnecessary and often counterproductive — trains are faster, parking is expensive and hard to find in city centers, and navigating unfamiliar city driving adds stress without a corresponding benefit over the train network. Where a car genuinely earns its cost is rural and less train-accessible regions: much of Hokkaido, parts of the Japan Alps, the Noto Peninsula, and other areas where train and bus coverage is limited and infrequent. A common and effective approach is taking the shinkansen to a regional hub, then renting a car locally for a few days of rural exploration before returning the car and continuing by train.
Japan drives on the left side of the road, which takes an adjustment period for visitors from right-side-driving countries, though Japanese drivers are generally patient and rule-following, and road signage in tourist-relevant areas increasingly includes English. Expressways (toll roads) are well-maintained and often the fastest route between regions, though tolls add up and are worth factoring into your cost comparison against rail alternatives. Rural roads can be narrow, particularly in mountain and coastal areas, and mountain driving in winter requires real caution and often snow tires or chains, which rental companies in relevant regions typically provide or require.
Rental car navigation systems in Japan are generally good but frequently default to Japanese-only menus, and inputting a destination via the built-in system can be genuinely cumbersome for non-Japanese speakers. Most travelers find it far easier to navigate using their phone's map app connected to mobile data, mounted on a simple phone holder, rather than wrestling with the car's built-in system — which makes a reliable data connection considerably more important for a road trip than for a train-based itinerary, where station signage and staff assistance fill in the gaps a phone might otherwise cover.
Parking in Japanese cities is expensive and often more complicated than visitors expect — many spaces use mechanized lift systems, and hourly rates in central Tokyo or Kyoto can be startlingly high compared to rural or suburban rates. This is a major reason city-based itineraries favor trains: a parked rental car in a city center often costs more per day in parking than a comparable day of train tickets, while also sitting unused. Rural accommodations, by contrast, generally offer free parking, which is part of why a car makes more practical sense once you're outside the major cities.
Beyond the IDP and your home license, most rental companies require a credit card for the deposit and want to see your passport at pickup. Insurance options vary by company, and it's worth understanding what's included versus optional before signing, particularly given how different liability and excess structures can be from your home country's norms. Returning the car with a full tank (rather than paying the rental company's refueling markup) and confirming the exact return location and hours in advance — some rural rental locations keep limited hours — are both worth double-checking before you drive off the lot.
If your main draw toward a rental car is a specific rural attraction rather than broad flexibility, it's worth checking whether a local bus tour or a train-plus-taxi combination covers the same destination, since these options remove the IDP requirement, unfamiliar-road stress, and parking logistics entirely. For travelers who want the flexibility of a car without full independent driving, some regions also offer guided driving tours with a local driver, which can be a reasonable middle ground.
Can I drive in Japan with just my regular driver's license? No — you need a valid International Driving Permit issued under the 1949 Geneva Convention alongside your home license. IDPs based on the 1968 Vienna Convention are not accepted, so check your home country's IDP type before you travel.
Is it worth renting a car for a Tokyo-Kyoto-Osaka trip? Generally not — trains are faster, parking is expensive, and city driving adds unnecessary stress for this specific route. A car makes more sense for rural regions with limited train access.
Which side of the road does Japan drive on? The left side, which takes some adjustment for visitors from right-side-driving countries, though Japanese roads and drivers are generally easy to adapt to.
Do I need my own GPS or data connection for a Japan road trip? It's strongly recommended — many rental car navigation systems default to Japanese-only menus, and most travelers find using their phone's map app with a reliable data connection considerably easier.
A rental car isn't necessary for most Golden Route itineraries, but for rural Japan — Hokkaido, the Japan Alps, coastal regions with limited train service — it opens up genuinely rewarding areas that trains don't reach well. If you do rent, a reliable data connection matters more on the road than almost anywhere else in a Japan trip, since your phone's map app is doing the navigation work the car's system often can't handle in English — a Kyoto Mobile eSIM keeps that connection running whether you're merging onto a Hokkaido expressway or looking for parking in a small mountain town.
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You don't need fluency — a handful of phrases plus a good translation app covers almost everything.