Is public WiFi common in Japan?

It is available in most train stations, convenience stores, and major cafes, but it is often slow and requires an annoying registration process for every single session.

Can I buy a physical SIM card at the airport?

Yes, there are vending machines for physical travel SIMs at Narita and Haneda, but they are significantly more expensive ($40+) than ordering an eSIM online.

Does my home roaming plan work?

It might, but check if your carrier charges a daily fee (often $10–$15/day). It is almost always cheaper to use a dedicated Japanese eSIM or pocket WiFi.

Stay Connected in Japan: SIM Cards, eSIMs, and Pocket WiFi

The easiest way to get internet in Japan is to purchase an eSIM via an app like Airalo or Ubigi before you land. If you need data for multiple devices or heavy usage, rent a pocket WiFi device at the airport arrival hall.

Decide on your data needs. If you are a solo traveler needing maps and basic web browsing, an eSIM is sufficient. If you are traveling in a group of 3+ people or need to work, a physical pocket WiFi device is more reliable and cost-effective for sharing.
Purchase an eSIM. Download an app like Airalo, Ubigi, or Holafly. Purchase a 'Japan' plan (usually 10GB to unlimited). Activate the QR code once you are connected to airport WiFi upon arrival. Ensure your phone is 'unlocked' by your home carrier before leaving.
Book a pocket WiFi. Reserve a unit from providers like Japan Wireless or Ninja WiFi at least 3 days before your trip. Select 'Airport Pickup' at your arrival terminal (e.g., Narita or Haneda). You will pick up the device at the post office or a dedicated counter.
Return the pocket WiFi. Before heading through security to depart, locate the post office or drop-off box at the airport. Place the device, cable, and charger into the provided prepaid envelope and drop it in the box. Do not leave the country with the device.

Is public WiFi common in Japan?: It is available in most train stations, convenience stores, and major cafes, but it is often slow and requires an annoying registration process for every single session.
Can I buy a physical SIM card at the airport?: Yes, there are vending machines for physical travel SIMs at Narita and Haneda, but they are significantly more expensive ($40+) than ordering an eSIM online.
Does my home roaming plan work?: It might, but check if your carrier charges a daily fee (often $10–$15/day). It is almost always cheaper to use a dedicated Japanese eSIM or pocket WiFi.