There is public wi-fi, but please don't use it. It is available at hotels and airports, and some stations, but some streets and rural areas don't have it. That gap becomes an issue when you're on the move all day.
This is why many travelers are choosing to select an eSIM for Japan prior to their flight. It is installed on your cell phone, then connects automatically upon landing. No SIM counters. No wi-fi pocket device. All mobile data will be available on arrival.
How eSIMs in Japan work. eSIMs in Japan work
An eSIM is an embedded SIM for your cellphone. No physical insert needed. You receive a QR code or app for downloading a mobile plan and activate it in settings.
These are the networks most tourists in Japan are using for their eSIMs:
- NTT Docomo
- KDDI au
- SoftBank
- Rakuten Mobile
These networks determine your in-the-wild coverage. A big difference is not felt in Tokyo, Osaka, or Kyoto. However, once you venture off to smaller towns and/or mountainous regions, stronger nationwide networks become more important.
Plan Types: Fixed Data vs Unlimited
If you are looking for the best eSIM in Japan, you will come across two types of plans.
Fixed Data Plans
These plans are designed to provide you with a specified amount of data for a predetermined amount of time.
Examples:
- 5 GB for 7 days
- 10 GB for 15 days
- 20 GB for 30 days
You can enjoy 100% speed until your data is complete. This is suitable for most visitors and use is predictable.
You mainly use:
- Maps
- Messaging apps
- Translation tools
- Social media
This plan typically doesn't cause problems if you don't use the service heavily for streaming video.
Unlimited Plans
Unlimited plans are not the same. The cost is for days, not data.
Examples:
- Unlimited for 5 days
- Unlimited for 10 days
- Unlimited for 30 days
However, there are unlimited limits to unlimited. However, most providers slow down your speed once you've reached a high-usage cap, which is typically between 2 GB and 5 GB per day. You still have an internet connection, but hefty applications are slower.
Unlimited travel plans are a popular option among travelers because they seem safer. Ultimately, fixed data plans tend to work out favorably in reality, unless you stream a lot or hotspot frequently.
Just How Much Data Do You Need in Japan?
The amount of use made of it is determined by how you get around.
Light User
Maps, messages, and translation are used almost exclusively.
Expected use:
- 300 MB to 700 MB per day
- The price is 3GB to 5GB for a week.
Typical Tourist
You use social media, photos,s and browsing.
Expected use:
- 1 GB to 1.5 GB per day
- 10 GB for a week
- 20 GB for two weeks
Heavy User
You are using video calls or a hotspot.
Expected use:
- The daily amount ranges from 2 GB to 4 GB.
- 50GB to 100GB for longer journeys.
Example Trip 1
7 days in Tokyo and Kyoto:
Maps are your daily companions, you take photos, and you check trains frequently. The 5GB to 10GB is sufficient for most users.
Example Trip 2
14 days, including rural areas:
You're more likely to use mobile data when you're out of town. For a safer buffer, get a plan of 10 GB to 20 GB.
Key Things to Compare Before You Buy
These are the important points to consider when analyzing your options:
It's not just the price of selecting a Japan eSIM. There are some actual considerations that you have to make.
Network Coverage
Coverage is dependent on the network behind your eSIM. Nationwide coverage needs to be enhanced, not just city performance, in rural Japan.
Data Rules
Always check:
- Total data
- Speed limits
- Fair-use policy
- Alternatively, each unlimited plan will come with daily caps.
This is more important than marketing labels.
Trip Duration
Most plans come in:
- 7 days
- 10 days
- 14 days
- 30 days
Ensure that your travel dates coincide with your plan. Avoid paying more for days that you don't use.
Hotspot Use
Check the tethering rules if you want to share the internet with another phone/laptop. It is allowed freely in some plans and restricted in others.
Setup Process
Other eSIMs can be loaded within seconds with a QR code. Some require manual configuration of the APN. Easy setup to save time after landing.
Brand Examples
Airalo provides travel eSIMs for Japan with short-term data plans of choice. It is suitable for tourists who travel to several countries.
Holafly specializes in short-term, unlimited usage plans as well as day-by-day usage plans.
Nomad offers fixed data plans with varying durations for the average tourist.
Ubigi is providing plans in Japan and the region that suit the needs of travelers who travel from one country to another.
Mobal's focus is limited to Japan. It also provides data-only SIMs and voice + data plans with a Japanese phone number. This works well when you need calls, SMS verification, or local services. It is also suitable for longer durations and heavier users who require more consistency.
Example Travel Scenarios
- 1 Week City Trip
Stay in Tokyo and Osaka. Mostly use maps, transport apps,s and social media.
It's sufficient to have a small fixed data plan.
- 2 to 3 Weeks Around Japan
You go through towns and townsites. Here, it's more important to have coverage.
A larger fixed plan or unlimited plan on a good network is better.
- Long Stay or Need a Local Number
Needs change after some weeks or months. A Japanese number might be required for booking, delivery,y or verification codes.
If so, then a provider such as Mobile, which specializes in Japan, is right for you. They provide eSIMs for extended periods of time with data and voice services.
This compares a Pocket WiFi Japan device with an eSIM
Both eSIM and pocket WiFi provide Internet, yet in different ways.
eSIM
- No device to carry
- No charging needed
- Instant setup
- Operates straight on your mobile device.
Pocket WiFi
- Operates on several devices
- Good for groups
- Helpful when you don't have an eSIM in your phone.
eSIM is easier to use when traveling alone or with a partner. Pocket WiFi still comes in handy for groups.
Learn how to set up your eSIM before travelling to Japan
Step 1: Check Your Phone
Ensure that your cell phone:
- Supports eSIM
- Is unlocked
Step 2: Purchase before flying
Buy your plan before you go and have Wi-Fi access.
You can browse an eSIM for Japan and select a plan to suit your travel.
Use the eSIM to install on the device.
Step 3: Install the eSIM
Use a QR code or the instructions of the app to scan. Set it up before travel and wait to activate until instructed to by your provider.
Step 4. You will now activate in Japan
After landing:
- Turn on the eSIM
- Set it as your data line
- If necessary, allow data roaming.
Step 5: Test Connection
Open maps/browser. If it fails, please verify your APN settings.
Conclusion
The eSIM for Japan that you need will vary according to your travel habits. For maps and messaging, a small fixed plan is good. If you're streaming, working remotely, or staying longer, you need more data or an unlimited plan.
Before purchasing, verify coverage, data limits, hotspot requirements, and set-up instructions. A small check before you depart will save you time upon descent and ensure your connection from day one in Japan.