eSIM for Japan Travel: Your Ultimate Guide to Staying Connected

For travelers visiting Japan, ensuring comfortable communication is very important. Access to the internet, such as for using map apps, searching for tourist information, making restaurant reservations, and using social media, greatly changes the travel experience. Especially for travelers unfamiliar with the language and place, a smooth internet environment leads to peace of mind.

This article explains "eSIM," which allows travelers visiting Japan to easily use the internet, in an easy-to-understand manner for beginners. eSIM is a very convenient option, especially for those who are worried about replacing SIM cards or find procedures at the airport troublesome. Prior preparation and information gathering are important so that you can save troublesome steps and communicate as soon as you arrive.

What is eSIM?

eSIM is an abbreviation for "embedded SIM," and it refers to a SIM that is embedded in the smartphone itself. There is no need to insert a physical card, and communication becomes possible by downloading a profile (contract information) to your smartphone.

Unlike conventional SIM cards, eSIMs can manage multiple profiles within a smartphone, and you can switch between multiple communication lines on one smartphone. This greatly reduces the hassle of purchasing new SIMs at overseas travel destinations, receiving explanations at shops, and replacing SIMs. Furthermore, since communication contracts can be completed online, it is possible to complete preparations before traveling.

Benefits of using eSIM

No need to replace SIM cards

Settings can be completed with just your smartphone, eliminating troublesome work.

Usable immediately upon arrival

If you purchase and set it up online, communication is possible as soon as you arrive in Japan.

Two lines can be used on one smartphone

You can set it as a new line for travel. Convenient for business trips and travel.

Eco & Smart

No physical card is required, reducing waste and making it an environmentally friendly choice.

No risk of loss

Since it is built into the smartphone, there is no need to worry about losing or damaging the SIM.

Comparison of eSIM and Physical SIM Card

eSIM is easier

Physical SIMs need to be purchased and replaced at airports or stores, but eSIMs can be completed online.

No need to manage SIM cards

With eSIM, you only need to download information to your smartphone, so there is no need to replace SIM cards.
Therefore, there is no need to communicate while in Japan or manage SIM cards.

Easy to manage multiple lines

eSIMs make it easy to switch profiles within your smartphone.

Comparison of eSIM and Pocket WiFi

eSIM is compact

Pocket WiFi requires carrying a device and charging it, but eSIM is completed with just your smartphone.

Cost can be reduced

Pocket WiFi has a daily rental fee, but eSIM is cheaper depending on the plan.

Pocket WiFi is also convenient for multiple people

Pocket WiFi is convenient if you want to share communication with multiple people, such as on group trips.

What to check while using eSIM in Japan

Check if your smartphone is eSIM compatible

Compatible models include iPhone XR and later, Google Pixel 3 and later, and Samsung Galaxy S20 and later.

Make sure your OS is up to date

It is recommended to have the latest iOS or Android version. It may not function properly on older OS versions.

Is SIM lock unlocked?

To use eSIMs outside of your home country, your smartphone must be SIM unlocked. If it is SIM locked, please apply for unlocking with your carrier.

Comparison of Recommended eSIM Providers for Traveling in Japan

Travel Mobile

Network: docomo (very reliable communication network in Japan)
Features: Attractive simple and easy-to-use plan structure. You can choose according to the period, such as 8 days, 16 days, and 30 days, and the data capacity is also sufficient.
Recommended for travelers: ◎ for short-term stays of 1-2 weeks or those staying for 1 month. The high cost performance and the ability to utilize docomo's stable communication are also points.

Ubigi

Network: docomo
Features: There are many data capacity options, especially the 30-day plan is abundant. Supports a wide range from 10GB to unlimited. The price range is slightly higher, but the communication quality unique to the carrier is attractive.
Recommended for travelers: Perfect for those who stay in Japan for a long time or those who consume a lot of data (watching videos, business use, etc.).

Airalo

Network: KDDI / Softbank Roaming communication
Features: A popular eSIM marketplace for travelers around the world. The convenience of being able to complete everything from purchase to installation with the app is highly rated. 2 plan configurations of 10GB and 20GB.
Recommended for travelers: Tourist and business visits within 30 days. It is easy to use, especially with a friendly interface for those who are new to eSIM.

Nomad

Network: KDDI / Softbank Roaming communication
Features: Simple UI and multilingual support app are strengths. Data capacity is also available from 10GB to 50GB, and the period is easy to choose from 30 days to 45 days.
Recommended for travelers: Those who plan to stay for a slightly longer period. Since the data capacity is large, it is safe for travelers who frequently use map apps, SNS, and watch videos.

How much data capacity do you need in Japan?

The guideline for the amount of data you need while staying in Japan is that it is safe to be able to use about 1GB per day. If you use tethering, you will need more, but choose a plan with sufficient data capacity so that you do not run out of data capacity.
How Much Data Do You Need for a Japan Trip? A Complete Guide to eSIM Solutions

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eSIM is an easy and convenient communication method for visitors to Japan, and the settings are simple and the support system is well-established. If you check compatible models and plans in advance, you will have a comfortable communication environment as soon as you arrive in Japan. Choose the optimal eSIM according to your length of stay and usage, and comfortably use the internet in all scenes of your trip, such as sightseeing, business, contacting friends, and posting on SNS. Make good use of eSIM and enjoy a stress-free and enjoyable trip to Japan.