The train wifi is NONEXISTENT! Just download stuff before!
Reliable internet is critical for navigation, ticket booking, and translation.
Rent a pocket Wi-Fi at the airport or buy a local SIM card. Providers like Japan Wireless (https://www.japan-wireless.com) and Sakura Mobile offer short-term plans. Coverage is excellent nationwide, even in rural regions, which makes this essential for independent travelers.
We used airalo and the internet worked GREAT!! Use code KRISTI0156 for $$ OFF!
Go check out my guide for the best free things to do as well as itineraries and travel tips to make your trip unforgettable.