Staying connected in Japan has never been easier. Data-only SIM cards and eSIMs are widely available, affordable, and work well across the country. Here's how to choose the right option for your trip.
Option 1: Tourist SIM Card
Physical SIM cards for tourists are available at airports (Narita, Haneda, Kansai, Chubu) and electronics stores like Yodobashi Camera and Bic Camera. Popular options:
IIJmio Tourist SIM: ¥3,300–¥5,500, 15–30 days, 10–20 GB. Reliable NTT Docomo network. OCN Mobile SIM: Similar pricing, NTT backbone. B-Mobile Visitor SIM: Available at airports, 15-day unlimited data plans. Most tourist SIMs are data-only — no voice calls, but Line and WhatsApp work for calls over internet.
Option 2: eSIM
If your phone supports eSIM (iPhone XS and later, most flagship Android phones), this is the most convenient option. Purchase online before traveling, download the profile, activate on arrival.
Airalo Japan: 1 GB (¥700) to 20 GB (¥4,400). Ubigi: 30-day plans from ¥1,800. Holafly Japan: Unlimited data, 5–30 days (¥3,500–¥8,000). eSIM cannot be used simultaneously with your home SIM on most phones — you'll switch between them.
Option 3: Pocket WiFi Rental
A pocket WiFi device lets multiple people share one connection. Good for groups or if your phone doesn't support eSIM. Available at airports: Global Advanced Communications, Telecom Square. Rental ¥500–¥1,200/day. Returns must be mailed or dropped at the airport — the extra step is the main hassle.
Coverage in Japan
Japan's mobile coverage is excellent. NTT Docomo and SoftBank have the widest rural coverage. On shinkansen and in urban metros, coverage is strong. Some mountain hiking areas (like deep Nikko or Hakone peaks) may have gaps.
Recommendation
For most tourists: eSIM (Airalo or Holafly) ordered before departure is the easiest and often cheapest. For groups of 3+: pocket WiFi may be more economical. If you need a physical SIM on arrival, airport kiosks at Narita and Haneda are well-stocked.
Frequently Asked Questions
What is the best SIM card for tourists in Japan?
IIJmio, Docomo Travel SIM, and Au Travel SIM are the most reliable options using Japan's major networks. Available at airports on arrival. For most travelers: a 10–15GB data SIM for ¥2,500–4,000 covering 10–14 days is the best value.
Can I use my home SIM card in Japan?
International roaming works in Japan but is expensive (typically ¥5–15/MB or fixed daily rates). A Japanese prepaid SIM is almost always cheaper for stays over 3 days. Check your carrier's Japan roaming rates before deciding.
Is a pocket WiFi or SIM card better for Japan?
SIM cards are better for most travelers: no extra device to carry or charge, no sharing bandwidth, and typically the same or better data speeds. Pocket WiFi makes sense if traveling with multiple people sharing one device, or if your phone doesn't accept foreign SIMs (rare with modern unlocked phones).
Where can I buy a SIM card in Japan?
At all major airports immediately after customs (look for SIM card counters in arrivals). Also at electronics stores (Bic Camera, Yodobashi), 7-Eleven stores in some areas, and online delivery to your hotel before arrival.