Apps to Install Before Japan: Maps, Trains, Translation and Emergencies

Travelling Japan independently leans on your phone more than most people expect: finding the right one of a dozen station exits, working out which platform to use, and reading signs and menus that are only in Japanese. The trouble is that there are so many apps it is hard to choose. This guide does not name one final answer; it sorts apps by what they do, how to set them up before the flight, and what to keep as a backup when the signal is weak or the battery is low.

The short answer

A practical minimum is one map app, one train route finder, a translation app that can read through the camera, and a safety information app for visitors. Add Visit Japan Web on your phone for arrival, and set up a digital transit card if your phone supports one. Most of these are free or have a free version, but features and terms can change with updates, so open each one at least once before you leave.

Cosa preparare

• Maps: Google Maps for hotels, restaurants, walking routes and trains. Save your hotel and planned stops as pins in advance.
• Trains: apps such as Jorudan's Japan Transit Planner or NAVITIME for Japan Travel show routes, platforms and timings in detail.
• Translation: Google Translate and Google Lens read signs and menus through the camera; download the Japanese pack for offline use.
• Safety: the Safety tips app from the Japan Tourism Agency gives disaster alerts and multilingual information.
• Arrival: Visit Japan Web for registering immigration and customs details in advance.

Passo dopo passo

1. 1Install and open each app onceSign in, allow notifications and location, and confirm the app works before departure day, not at the airport.
2. 2Download offline dataDownload maps of the cities you will visit and the Japanese language pack on Wi-Fi so they still work in weak-signal places like underground stations and trains.
3. 3Save your key placesSave your hotel address in Japanese or as a screenshot in case you need to show it to a taxi driver or ask for directions.
4. 4Pack a power bankMaps and a camera translator running all day drain the battery, so a power bank and cable should always be in your bag.

Costs and documents

The main apps mentioned are mostly free, though some train-search apps charge for advanced features such as detailed train data or ad removal, and prices and plans change. The documents involved are few: an account to sign in, and the QR code from Visit Japan Web once you register. Keep a screenshot of it on your phone in case the signal is poor. If you plan to use a digital transit card on your phone, check whether your phone model and the payment card you load it from are supported, because that depends on the manufacturer and the card issuer.

Errori comuni

• Installing apps at the airport after landing, which wastes time and may mean unstable Wi-Fi.
• Relying on the map alone without noting the line and station exit, then coming out on the wrong side and walking a long way round.
• Trusting machine translation literally without context, especially for menus and warning signs. Combine it with pictures or ask staff.
• Not setting up disaster alerts, so you miss information about earthquakes or storms.
• Running up roaming data by accident after forgetting to configure the phone for a SIM or eSIM.

Checklist

1. Install and test the map, train and translation apps.
2. Download offline maps and languages.
3. Install Safety tips and turn on alerts.
4. Save 110 and 119, along with contact details for the Thai embassy in Japan.
5. Charge fully, and carry a power bank and a cable.

All of these apps depend on a data connection once you are out on the street: live route updates, camera translation and disaster alerts. Having an eSIM or SIM that works from the moment you land lets the whole set run at full strength.

Vedi i piani eSIM per il Giappone

FAQ