Japan SIM Card vs eSIM vs WiFi Router: Which to Choose?

The final decision before coming to Japan: How to solve your mobile network?

Three mainstream options—eSIM / SIM card / WiFi device—each have their pros and cons. Below we compare them from a usage scenario perspective.

3 Plan Comparison

Key factors to consider: number of people, length of stay, data requirements, and whether you're willing to exchange for a physical SIM card.

01｜eSIM｜Perfect for Short Trips

Perfect for short trips of 3-5 days. Purchase on platforms like Airalo or Holafly before departure and activate immediately upon arrival. No need to swap physical SIM cards or return anything. Pricing is around ¥1,200-1,800 for 5GB/7 days.

Limitation: Your smartphone must support eSIM (iPhone XS or later, recent high-end Android devices). You can use dual SIM simultaneously and keep your Taiwan / Hong Kong phone number to receive SMS.

02｜SIM Card｜Best Rate for Long-term Stay

Staying 7+ days and budget-conscious? Consider a SIM card. Brands like Sakura Mobile, IIJmio, and Mobal offer 20–30 day SIM plans with 5–10GB for around ¥3,000–5,000.

Physical card exchange is required (you cannot receive SMS on your original phone number). Pickup at the airport or delivery to the hotel is available.

03｜WiFi Device｜Most economical for sharing with multiple people

Perfect for 3-5 people. One WiFi device supports simultaneous connection of 5-10 devices, at ¥600-1,000 per day.

Battery life is 8–10 hours. Please bring a charging cable. Upon returning to your home country, please return the device to the provider (dropbox available at the airport).

For 90% of travelers, **eSIM is the simplest answer**. If you're on a tight budget or traveling in a large group, consider SIM cards or WiFi devices as alternatives.

IGO HOTEL rooms come with complimentary Wi-Fi, so mobile data is primarily needed for navigation and getting around outside the hotel.