No WiFi in Japan: the offline survival kit

JapanMust Guides · 5 min read

Japan has great infrastructure and surprisingly patchy connectivity for visitors: basement restaurants, rural temples, mountain trails, and the long subway rides between them. The fix isn't better roaming — it's preparing while you still have WiFi. Do this the night before you fly.

Download before you fly

1. Offline maps — Google Maps → your profile → Offline maps → download Tokyo, Kyoto, Osaka regions. Takes 10 minutes on hotel WiFi, saves you daily.
2. Japanese language pack for your translator app — the offline pack is what makes translation work in airplane mode. Download it at home, not at Narita.
3. Japan Transit / Jorudan — train schedules work offline once routes are cached; screenshot your key routes too.
4. Your hotel's address in Japanese — screenshot it. Showing a taxi driver kanji beats pronouncing it.
5. Key phrases as images — screenshot allergy cards, "where is the bathroom", and your hotel name. Photos work when apps don't.

Where you'll actually lose signal

• Basement restaurants — half of Tokyo's great food is underground.
• Between subway stations — tunnels kill data mid-navigation.
• Temples, mountains, onsen towns — rural coverage is spotty.
• Shinkansen tunnels — brief but regular drops.

The 30-second rule

Before you go underground or rural, screenshot the next step: the map pin, the train platform number, the restaurant address in Japanese. Screenshots don't need signal.

Free WiFi reality check

Japan's free WiFi (at stations, konbini, Starbucks) usually requires email registration per hotspot and drops when you walk away. Treat it as a bonus, not a plan. If you need constant data, get an eSIM before departure — but still download the offline kit, because eSIMs also die in basements.

Phrases for the disconnected moments