eSIM Japan for Tokyo, Osaka, Kyoto, Nagoya, Sapporo: Which Network Offers the Best Coverage?

Some travelers purchase a SIM card in Japan only to find that it does not work. There are two primary reasons for this:

1. The smartphone does not support Japanese frequency bands.

2. APN (Access Point Name) settings are not correctly configured.

With eSIMs, smartphones that support eSIM technology generally cover Japan’s frequency bands, reducing the risk of compatibility issues. However, many travelers encounter connectivity problems due to incorrect APN settings. In such cases, configuring the correct APN settings will resolve the issue.

What is an eSIM? Why Use It in Japan?

An eSIM (embedded SIM) is a digital SIM card built into modern smartphones and tablets. It offers several advantages for travelers:

• Convenience: You can purchase and activate an eSIM online before or after arriving in Japan, eliminating the need to find a physical SIM card.
• Cost-Effective: eSIM plans are often more affordable than international roaming charges from your home country’s carrier.
• Flexibility: Choose a data plan that matches your needs and budget, from a few gigabytes to unlimited data options.
• Dual SIM Functionality: You can keep your original phone number for calls and texts while using a Japanese eSIM for data.

How to Check eSIM Compatibility for Use in Japan

Before purchasing an eSIM, ensure that your device supports eSIM functionality. Most newer iPhone and Android models support eSIM. You can usually check this information in your device settings or on the manufacturer’s website.

Additionally, eSIMs are compatible with devices that have a 32-digit EID. This includes most modern smartphones, such as iPhones and recent Android models, as well as many smartwatches and tablets. To find your device’s 32-digit EID, check your settings or dial *#06#.

Mobile Networks Covering Japan’s Major Cities

Japan has four major mobile network operators:

Docomo

Considered to have the best coverage across both urban and rural areas in Japan.

KDDI au

Provides excellent coverage in major cities and is known for its high-speed data connectivity.

SoftBank

Offers good coverage in urban areas but may have limited service in some rural regions.

Rakuten Mobile

Provides fast data speeds in cities but has limited coverage in some rural areas.

For travelers staying in cities like Tokyo, Osaka, Nagoya, Fukuoka, Kyoto, and Sapporo, any of these networks should provide stable connectivity. For most city-based travelers, the network provider choice is not a major concern.

If you're visiting local areas in Okinawa or Hokkaido, we recommend using an eSIM that operates on docomo's network.
Stay Connected in Hokkaido: The Best eSIM with docomo

Recommended eSIM Plans for Travelers in Japan

Below are some popular eSIM providers and their plans suitable for visitors to Japan:

Unlimited data plans allow you to stay connected without worrying about data limits.

When choosing an eSIM plan, consider the following factors:

• Data Allowance: Estimate your data usage based on your typical activities (social media, streaming, navigation, etc.).
• Validity Period: Select a plan that covers the duration of your trip.
• Cost: Compare different providers to find the most cost-effective plan.