KDDI 5G Network provides
Non-stop internet
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Lightning-fast 5G speeds with no slowdowns |
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Same top quality network used by locals |
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The best price per GB you’ll find |
As this plan connects directly to KDDI's local towers, it ensures low latency. The download ping is only 42ms, which is an excellent score. You can also experience download speeds of up to 600Mbps in 5G mode.
All our plans include
these benefits
Unlimited
at
5G Max Speed
Nationwide
Coverage
Free Mobile
Hotspot
Free au
WiFi Zone
Things to know
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Check CompatibilityBefore ordering, ensure your device is carrier-unlocked and compatible.
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Mobile HotspotThe mobile hotspot data allowance varies depending on the date option. Please refer to the details below. *Mobile Hotspot Data
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Activation PointData plan will start as soon as you connect to local network. You can scan the QR code and install the eSIM in advance. As this plan is directly provided by a Japanese Carrier(au by KDDI), there’s no need to toggle on [Data Roaming]. |
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5G Connectivity5G is available in compatible phones in 5G coverage zones. 5G coverage may vary depending on regional circumstances. Refunds due to lack of 5G support will not be accepted. |
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Unable to Reinstall or TransferRemoving the eSIM will delete the data plan from your phone. You can’t install the eSIM again. Please do not remove your eSIM by tapping [Remove Cellular Plan] button while in use. |
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For assistance, contact the ESIMWORLD.net anytime at [email protected] or via WhatsApp. |
Desinged for Remote Work and Travel in Japan
01
Designed for Heavy Data Users
A fast and reliable plan for travelers who need seamless internet throughout Japan — ideal for streaming, hotspot sharing, and remote work.
02
Install Before You Fly
You can install the eSIM before departure and activate it automatically when you land in Japan — no store visit or SIM swap needed.
03
Real-World Performance
Spend a morning working from a cafe in Shibuya — jumping between Zoom calls and uploading edited footage to the cloud simultaneously, without interruption.
04
A Smarter Alternative to Pocket WiFi
Compared to pocket WiFi, eSIMs eliminate the need to carry extra devices or recharge separate batteries.Unlike physical SIM cards, eSIMs can usually be installed before departure without visiting a local store in Japan.
Unlimited data is enough for travelers to do everything
Translate a text on Google Translate
Watch videos on Youtube
Search routes on Google Maps
Send a text message on WhatsApp
Call a taxi from Uber
Our Local Network covers 99% of the time in Japan
ESIMJAPAN.com offers reliable service on the KDDI’s network. You’ll enjoy 4G/5G speed almost everywhere you travel in Japan.
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150,000+ Travelers like you already used our eSIM
Join them now!
We have helped thousands of customers get hassle-free connectivity. Experience the easiest way to stay connected.
What you can expect
How it works
Get eSIM at your fingertips, Get ready for your trip!
Step 1
Pick a plan
Choose the plan that suits your travel needs and place an order.
Step 2
Scan the QR code
Receive the QR code via email and instantly scan it to activate.
Step 3
Ready to go!
Have a light and enjoyable trip without any data concerns.
Our Promise
24/7 Personalized Support
No matter when you reach out—whether it's 2 PM or 2 AM— our dedicated customer support team is ready to help you. Get practical and helpful solutions from skilled human experts.
Frequently asked questions
Which eSIM is best for Japan?
The best Japan eSIM depends on how you plan to use data during your trip, but for most travelers, we recommend the 5G Unlimited Max plan for the smoothest and most reliable experience. ESIMJAPAN.com offers four plans, including 5G Unlimited Max for remote workers and heavy streamers, Unlimited Data for everyday tourists, and Fixed Data plans for light or short-stay travelers. With premium 5G network access and truly worry-free connectivity across Japan, 5G Unlimited Max is the ideal choice for travelers who want fast, stable internet without compromise.
What are the best eSIM providers for Japan?
The most frequently recommended Japan eSIM providers are ESIMJAPAN.com, Airalo, Holafly, and Ubigi. ESIMJAPAN.com is the only Japan-exclusive provider, with plans specifically designed for Japan travel — including a daily reset option, a truly unlimited plan with no speed cap, and a 5G max-speed tier. Airalo and Holafly cover 200+ countries and are better suited for multi-destination trips across Asia.
How do I buy an eSIM for Japan?
Buying a Japan eSIM from ESIMJAPAN.com takes under five minutes: select your plan, pay online, and receive a QR code by email immediately after purchase, no physical SIM is shipped.
Install the eSIM at home before departure by scanning the QR code in your phone’s cellular settings (Settings → Cellular → Add eSIM). Your plan’s data validity begins when your device first connects to a Japanese network, not at the time of installation.
How do I activate an eSIM in Japan?
Activation in Japan is automatic once the eSIM is installed. In your phone’s cellular settings, set the eSIM as your Data line, and your device connects to a Japanese network as soon as it detects a signal on arrival. If you don’t connect immediately upon landing, toggling Airplane Mode off and on resolves most delays within 30 seconds; no app, store visit, or Japanese-language interaction is required.
Is eSIM cheaper than pocket WiFi in Japan?
For solo travelers, a Japan eSIM is almost always less expensive than pocket WiFi. Pocket WiFi rentals in Japan typically cost ¥600–¥1,200 per day plus a return fee, while an ESIMJAPAN.com plan for the same period is generally priced below that range with no additional fees. Pocket WiFi may offer a cost advantage for groups of three or more sharing one device simultaneously.
Is 5G worth paying for on a Japan eSIM?
For city-focused itineraries, yes! Japan’s 5G network is well-developed in Tokyo, Osaka, Kyoto, Fukuoka, and along major Shinkansen corridors. The 5G Unlimited Max plan from ESIMJAPAN.com delivers 100–200+ Mbps, compared to other eSIM plans. For itineraries centered on rural areas or smaller towns, the standard Unlimited plan is typically sufficient and more cost-efficient.
How does eSIM work in Japan?
An eSIM is a programmable chip built into your phone that connects to a mobile network without a physical SIM card. After purchasing a plan from ESIMJAPAN.com, you scan a QR code to install the carrier profile, and your device connects directly to a Japanese domestic network -KDDI- on arrival — not through international roaming. Your home SIM remains active for calls and texts while the eSIM handles your Japanese data as a separate second line.
Is 5G available in Japan for tourists?
Yes! as of 2026, Japan’s 5G network is well-developed and accessible to tourists via ESIMJAPAN.com’s 5G Unlimited Max plan. Reliable 5G coverage is available in Tokyo, Osaka, Kyoto, Fukuoka, Sapporo, Nagoya, Hiroshima, and along major Shinkansen corridors. In areas without 5G signal, the connection falls back to 4G LTE automatically with no action required.
Can I use my Japan eSIM as a mobile hotspot?
Yes, the 5G Unlimited Max plan from ESIMJAPAN.com supports personal hotspot and tethering, making it the recommended choice for travelers who need to connect a laptop or tablet during their trip in Japan. Tethering allowance equals your total plan days minus one GB (for example, a 3-day plan includes 2 GB of tethering data).
Can I use Nationwide eSIM Plans everywhere in Japan?
Yes, eSIM Japan 5G Unlimited Max Data plans work everywhere in Japan. We select and offer the best data plans which provide the best nationwide coverage.
Should I order and activate an eSIM before traveling?
You can purchase an eSIM at your convenience, either one day before your travel date or upon arrival at your destination.
Additionally, please note that to install the eSIM, your device must be connected to a Wi-Fi or a cellular data network.
Does eSIM Japan 5G Unlimited Max Data truly offer Unlimited Data?
Yes, there is no speed cap. However, excessively high mobile data usage may result in carrier penalties without prior notice. Please note that no refunds, cancellations, or returns will be accepted.
Is 5G network available in all areas of Japan?
5G is available in compatible phones in 5G coverage zones. 5G coverage may vary depending on regional circumstances. Refunds, cancellations, or returns, due to lack of 5G support are not possible.
Are voice calls and SMS available with the eSIM plan?
You cannot make phone calls or use SMS with this eSIM plan.
eSIM Japan 5G Unlimited Max Data plans are data-only and do not include a local mobile number.
Where can I use Free au WiFi?
Please check the au WiFi Zone here: https://au.wi2.ne.jp/area/.
Common au Free WiFi Zone: Starbucks, Doutor, KFC, Subway, Don Quijote, Big Camera
After my eSIM plan expires, can I extend it?
Please note that we do not offer a top-up service for eSIM Japan 5G Unlimited Max plans. Instead, we recommend purchasing a new eSIM plan and installing it on your device again.
Are there any inaccessible mobile apps when using the eSIM plan?
You are free to use all mobile apps without any restrictions.
What should I know about purchasing multiple eSIMs?
1. Check the ICCID and install each eSIM separately.
Each eSIM can only be installed once and on one device.
Please use the ICCID to distinguish each eSIM and install them on different devices.
You can find the ICCID and Order Number on your QR code voucher.
2. Make sure you’re installing on the correct device.
After an eSIM is installed on a device, it cannot be moved to another device.
Please double-check the intended device before installation.
3. One ICCID per device.
Do not scan the same ICCID on two devices.
Each eSIM must be installed on a separate device.
4. Do not delete the eSIM.
Once deleted, the eSIM cannot be reinstalled.
If you are experiencing an issue, please contact customer support before removing it.
How can I get support from ESIMWORLD.net Team?
You can contact our Team anytime at [email protected] or on WhatsApp.
Reviews on 5G Unlimited Max Data – Truly Unlimited Data Plan with Instant Activation
5G Unlimited Max Data – Truly Unlimited Data Plan with Instant Activation
| 5 star | 86% | |
| 4 star | 7% | |
| 3 star | 2% | |
| 2 star | 1% | |
| 1 star | 4% |
Customer Images
I am so glad I purchased the unlimited data plan for so many reasons!
1) I have “Global Passes” through Visible (uses the Verizon network), but heard there were initial connectivity issues. Indeed this proved true for my friend who is on Verizon. She couldn’t connect and ended up buying a physical SIM at the airport (which she still couldn’t get to work and the SIM got stuck in her phone). Before landing I had turned off data roaming, set eSIMJapan as my data provider, and had service the moment I landed in Haneda.
2) My hotel in Kyoto did not have password protected Wi-Fi (this is common in Japan). Me being the paranoid fool I am, I did all my banking, payments etc. over data. One of those days I did hit the 2GB mark and again was glad I had splurged and bought the eSIMJapan unlimited data plan.
3) By dual simming my domestic carrier and having eSIMJapan, I was stacking network carriers for broader coverage. I was travelling into smaller towns and into the mountains. KDDI-AU is great in cities (but can slow when network traffic is high). With Visible, I was pinging off NTT-DOCOMO towers as well.
Thank you for sharing your valuable experience! We’re delighted to hear that our unlimited data plan provided seamless connectivity from the moment you landed and throughout your travels across Japan. It’s great to know the reliable coverage and unlimited data gave you peace of mind during your trip. We truly appreciate your support and hope to serve you again on your next adventure!
Just perfect!
Thank you so much for your wonderful review! We’re thrilled to hear that everything was just perfect. We truly appreciate your support and hope to serve you again in the future!
좋은 경험이었습니다. – It was a good experience.
Thank you for your feedback! We’re happy to hear that you had a good experience. We truly appreciate your support and look forward to serving you again in the future.
Really easy
Thank you for your wonderful 5-star review! We’re thrilled to hear that you found our eSIM service easy to use. We appreciate your support and hope to serve you again on your next trip!
Worked perfectly 👌
Thank you for your feedback! We’re thrilled to hear everything worked perfectly. We appreciate your support and look forward to keeping you connected on your future travels!