Before you leave home.
Check the entry rules for the passport you will actually use, the purpose of the visit and your full routing. Do not assume someone else’s visa exemption, residency or airline advice automatically applies to you. Use official government guidance and complete the airline’s own document checks.
Visit Japan Web is the official Digital Agency service for arrival procedures. Prepare it through the official website rather than an advertisement or look-alike intermediary. Keep essential arrival information available offline: the accommodation name and address, onward/return information and any documents you must show. A completed web form is not itself permission to enter.
On arrival, resist a tightly timed first-night reservation. Immigration, bags, connectivity setup and an unfamiliar transfer are a poor place to test your maximum efficiency. Pick an easy first meal near your accommodation and let the first evening be recovery, not a project.
Cards for convenience. Cash for resilience.
Card acceptance is useful but uneven. Carry a sensible yen reserve for small restaurants, older shops, ticket machines and moments when a foreign card does not work. The right reserve depends on your plans; it is not a reason to carry the whole trip’s spending in your wallet.
Use a reputable ATM and check the fees shown before accepting. If a merchant or ATM offers to convert the transaction into your home currency, compare carefully: paying in yen generally avoids the merchant’s conversion rate, though your own bank’s fees still matter. Set up a backup card and know how to unlock or contact your issuer without relying on a single phone connection.
Do not count an IC-card balance as universally spendable cash. It is useful stored value, with issuer-specific purchase, top-up and refund rules. Keep enough headroom on your payment options for a hotel deposit or a booking where the local operator cannot accept your preferred card.
Choose your connection before you need a map.
eSIM or physical SIM: good choices when each traveler wants an independent connection. Check that the phone is unlocked, supports the provider’s network and accepts the chosen SIM type. eSIM support depends on the exact model and sales market, not just the brand. Apple’s own setup instructions list device and activation requirements; use your manufacturer’s equivalent and the provider’s compatibility list before purchase.
Compare data allowance, validity, coverage, hotspot/tethering permission and what happens when the allowance runs out. Confirm when validity starts before installing or activating the plan. Do not assume a data-only plan provides a Japanese voice/SMS number. Keep your home line’s roaming settings deliberate: choose which SIM handles mobile data and ask your home carrier what leaving its line active may cost.
Pocket Wi-Fi: useful when several devices can share one connection, or a phone cannot accept a travel SIM. It is another device to collect, charge, carry and return. Everyone relying on it needs to stay within its wireless range; it is less convenient when your group splits up. Check the actual pickup location, return deadline, coverage and plan limits rather than reading “unlimited” as a performance guarantee.
Hotel and public Wi-Fi: useful backup, not the whole navigation plan. JNTO notes airport Wi-Fi, hotel connections and public hotspots, but access, registration and signal quality vary. Confirm the accommodation’s connection if you need video meetings; the presence of a Wi-Fi icon is not a bandwidth promise. Download offline maps and language files, save the hotel address and ticket details, and keep activation instructions accessible before leaving the airport connection.
Three transport problems. Three different tools.
Local trips: an interoperable IC card is convenient on many participating rail, subway and bus networks. Tap with the same card or device at entry and exit, follow the reader’s result, and top up before a low balance becomes a gate problem. Physical-card and phone-wallet setup depend on your device, issuer and payment card; verify your specific combination rather than assuming every Android or foreign card works identically.
Intercity travel: a stored-value IC card is not, by itself, an all-inclusive Shinkansen ticket. Use the appropriate ticket/reservation system, check the actual station, train, seat and date, and keep the reservation accessible. Tokyo Station and Shinagawa are not the same departure point; Osaka and Shin-Osaka are not the same station.
Airport access: choose a transfer to your actual airport and terminal, not merely “Tokyo.” Narita and Haneda have different geography. Compare a useful arrival time with the last local connection, hotel access and baggage load. A station-to-station train duration is not a door-to-door travel estimate.
A national rail pass is a product to price, not a rite of passage. Compare the exact covered journeys, consecutive-day window and train restrictions against separate tickets. A busy calendar of city sightseeing does not necessarily create much long-distance rail value.
Your suitcase is part of the route.
Measure a large suitcase before booking the Tokaido/Sanyo/Kyushu Shinkansen. JR Central says baggage with length + width + height greater than 160 cm and up to 250 cm requires a seat with the appropriate oversized-baggage area; baggage over 250 cm cannot be brought aboard. The space is not secured merely because your train has empty seats.
Forwarding luggage can make a Kyoto–Osaka–Tokyo route much more pleasant, but obtain the carrier’s actual delivery date, cutoff and receiving-hotel confirmation. Do not assume ordinary forwarding is same-day. Carry medication, valuables, chargers and enough clothes for the delivery interval.
For each hotel change, count packing, checkout, storage, station navigation and the walk from the last station. A lower room price can lose its advantage if it introduces another move. One comfortable base and an unhurried outing often beats a sequence of theoretically optimal one-night stays.
Check medicines by ingredient, not packaging.
A medicine being legal and prescribed at home does not establish that it may be brought into Japan. Check the active ingredients and quantities with Japan’s Ministry of Health, Labour and Welfare; controlled substances may need different advance permissions or may be prohibited.
MHLW lists quantity-based exemptions for some personal medicines, but those are not a blanket exemption for every ingredient. Do the check before departure, not while packing at midnight. Keep medicines in identifiable packaging and carry the documentation relevant to your case.
For allergies, carry an accurately translated written card and confirm with the establishment before booking or ordering. Fish stock, wheat, soy sauce, shared frying oil and small garnishes can matter even when the main ingredient looks suitable. A vegan-looking dish is not a promise of vegetarian stock; a rice-based dish is not a gluten-free guarantee.
Useful in your phone before you need it.
Japan’s emergency numbers are 110 for police and 119 for fire or ambulance. Give the exact location and nature of the problem; an address or a nearby business name can help. The JNTO visitor hotline offers assistance and tourist information, including support in English, Chinese and Korean.
Save accommodation details, insurance contacts and an offline map. Follow official earthquake, weather and transport notices rather than a social-media rumor. If a service is suspended, re-solve the journey around what is actually running; an elegant original itinerary is not a reason to ignore an official warning.
Build redundancy: a spare payment method, a small power bank, offline booking details, and a way to contact your travel companion when one phone fails. These are quiet safeguards, not reasons to treat a normal trip as an emergency drill.