Staying connected in Japan is essential for navigation, translation, and travel apps. Whether you’re visiting Tokyo, Kyoto, or Okinawa, a reliable SIM or eSIM ensures a smooth trip. This 2025 guide explains how to choose, compare, and activate Japan’s best SIM cards.
Types of SIM Cards in Japan
Type
Best For
Internet Speed
Purchase Options
Prepaid SIM
Short-term visitors
4G/LTE
Airport, Online
eSIM
Tech-savvy travelers
5G (supported phones)
Online, instant setup
Data-only SIM
Tourists using VoIP
4G
Convenient stores, vending machines
Voice + Data SIM
Long-stay users
4G/5G
Japan Experience, JRPass partners
Top SIM Providers (2025)
Provider
Type
Coverage
Best For
Mobal Japan SIM
Physical
Nationwide
Reliable customer support
Airalo Japan eSIM
eSIM
Nationwide
Instant activation
Sakura Mobile
SIM & Wi-Fi
Nationwide
Long-term visitors
Comparison: SIM vs eSIM
Feature
SIM Card
eSIM
Setup
Physical insert
Digital download
Speed
4G/LTE
5G-ready
Device Limit
1 phone
Multi-device (some plans)
Activation Time
5–10 mins
Instant
Tips for Tourists
Unlock your phone before arriving in Japan.
Check if your device supports eSIM (iPhone XS+, Pixel 4+).
Buy online for better rates and skip airport queues.
