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eSIM Japan: Prepaid Data Plans
Japan eSIM plans start at $3.99 for 1 GB; our top plan for Japan alone is unlimited data for 15 days at $28.99 (eSIMPlus), the top multi-country one 35 GB at $27.99 (3 countries). Here a plan for Japan alone costs less per GB than any multi-country plan (87 plans from 8 vetted providers). Prices updated ·
Japan eSIM at a glance
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Your next trip.
Connected.
Choose your travel eSIM and manage it in the MobiMatter app.
Networks used by Japan eSIMs
Each plan connects to the networks listed on its page, so you choose your carrier before you buy. Coverage varies by area: a listed network does not guarantee signal everywhere.
Frequently Asked Questions
What is the cheapest eSIM for Japan?
The cheapest plan that works in Japan is a multi-country one: $3.99 for 1 GB, valid for 14 days. The cheapest plan for Japan alone is 3 GB for 5 days at $4.49. Prices come live from 8 vetted providers and change often.
Is it worth getting an eSIM for Japan?
For most travellers, yes, if your phone supports eSIM. Japan plans start at $3.99 for 1 GB, and the longest lasts 365 days, which suits long stays and repeat visits. If your home plan already covers Japan at no extra cost, you may not need one.
Which networks do Japan eSIMs use?
Japan eSIMs on MobiMatter run on SoftBank, NTT docomo, au (KDDI), and Rakuten; 5G plans are available on SoftBank, NTT docomo, au (KDDI), and Rakuten. SoftBank carries the most plans. Each plan names its network, so you choose your carrier before you buy.
Which eSIM is best for Japan?
For Japan alone, our top plan right now is unlimited data for 15 days at $28.99 from eSIMPlus. If Japan is one stop of several, the top multi-country plan is 35 GB for 30 days at $27.99 from TSimTech, covering 3 countries. If price per GB is all that matters, the lowest right now is $0.60 per GB, with 50 GB for 30 days.
How much data do I need for a week in Japan?
It depends on how you use your phone. Light use (maps, messaging, browsing) takes about 0.5–1 GB a day; scrolling a lot of social video can take 2–3 GB or more. Typical use per hour:
- Instagram Reels, TikTok: 0.3–1 GB
- YouTube, Netflix at standard quality: 0.5–1 GB
- Video calls (WhatsApp, FaceTime): 0.5–1 GB
- Voice calls (WhatsApp, FaceTime Audio): 50–70 MB
- Maps and navigation: 2–6 MB
- Messaging and browsing: 50–150 MB
The cheapest Japan plan with at least 5 GB for a week or longer is 5 GB for 15 days at $5.49.
Is there an unlimited data eSIM for Japan?
Yes. Unlimited data plans for Japan start at $4.99. Many unlimited plans slow down after a daily high-speed allowance, so check the fair-use terms on the plan page before you buy.
Do Japan eSIMs support 5G and hotspot?
5G is available on 48 plans for Japan, where the local network has 5G coverage; the others use 4G/LTE. Hotspot (tethering) works on every plan, so you can share your data with other devices.
Does a Japan eSIM come with a phone number?
Most travel eSIMs, including most Japan plans, are data-only and have no local number. You keep your usual number on your main SIM for calls, texts and WhatsApp. Plans that include a number or minutes say so on the plan page.
Will my phone work with a Japan eSIM?
Yes, if it supports eSIM and is not locked to a carrier. To check, dial *#06#: if an EID number appears, your phone supports eSIM. Most iPhones from the XS/XR on, Galaxy S20 and later and Pixel 3 and later do, except most models sold in mainland China and some sold in Hong Kong and Macao.
Can I keep my own SIM and WhatsApp while using a Japan eSIM?
Yes. Your eSIM and your main SIM can be active at the same time. Use the eSIM for mobile data with data roaming on for that line, and turn data roaming off on your home SIM to avoid charges. WhatsApp keeps working on your usual number.
How it works
- 1
Checkout using secure payment methods
Get your eSIM by email within seconds.
- 2
Install eSIM
Instantly get your eSIM and configure it in your eSIM compatible device
- 3
Enjoy high speed connectivity
Once eSIM is configured, you can enjoy high speed roaming data connectivity
Why get your Japan eSIM from MobiMatter
All your eSIMs in one app
Buy, install and top up every eSIM in the MobiMatter app, and check how much data you have left at any time.
Choose your network
MobiMatter shows which network each plan uses, so you choose your carrier before you buy. Pick from 87 plans from 8 vetted providers with the data and price that fit your trip.
24/7 support
Our support team is available 24/7, before and after you buy, for every eSIM you get from MobiMatter.
What our customers say
5.0
Mentions JapanFor our trip to China, South Korea, and Japan, my wife and I bought two 12GB data packages and used them without any problems. Their prices are much more reasonable compared to competitors; I definitely recommend them.
AAbdullah Gokhan Demir
Play Store5.0
Mentions JapanI used it for the first time with my wife during our trip to Japan and Korea, and I didn't experience any connection problems. The internet was fast enough in both Japan and Korea, and I was satisfied with the app. I recommend it.
Translated from Turkish
DDinçer Altınok
Play Store5.0
Mentions JapanPerfect in my Japan Trip and Cheaper
AAs de ases
Play Store5.0
It was awesome and seamless. I was connected with fast speed internet throughout my stay in Canada
EEsther Koomson Esq
Play Store5.0
I often travel a lot and the eSIM always works very well, strong connection and I feel I have much longer internet as wel. Besides the customer service responds extremely quick, having your questions answered in no time.
MMayNais
App Store5.0
Amazing service! I’ve used Mobimatter many times and I’m always impressed by how fast and helpful their support team is. They assisted me quickly whenever I had a question, and everything was resolved smoothly. The eSIMs are reliable, easy to install, and work exactly as expected. I keep coming back because the service is consistently excellent.
JJoka_94
App Store5.0
Whenever I faced an issue and wrote to the desk, they solved my problem immediately. I received very good internet service in 30 countries across 4 continents. I am very satisfied with Mobimatter.
Translated from Turkish
AAvg user01
App Store5.0
I used over 4 times and their service is great, fast and reliable 😊 Customer service is also very quick to respond!
CCarmen Jost
App Store5.0
I use MobiMatter regularly when I travel, never had a single issue with it. Yesterday I did have a problem and their team solved it trough email very quickly, thank you you are very professional!
ZZokaLazic
App Store5.0
I’m using MobiMatter for the first time and I’m very impressed! The eSIM works perfectly, the prices are very affordable, and the customer service is excellent and helpful. Everything has been smooth and easy so far. Highly recommended!
VVincenzo Floriddia
Play Store5.0
Easy-to-use, reliable, good prices, meet all expectations..
AArkady Palarya
Play Store5.0
The best eSim provider in the world. In case you don't have experience and don't know how to start, they respond within just a few minutes via email. They are TOP
RRedzad Dikonja
Play Store
Japan eSIM guides
Aug 7, 2025 — 10 min read
Best eSIM for Japan: A Comprehensive Guide for Travelers
Japan, a captivating blend of ancient traditions and cutting-edge technology, is a dream destination for travelers worldwide. From the bustling streets of Tokyo to the serene temples of Kyoto and the scenic landscapes of Hokkaido, every journey is enriched by seamless digital access. Whether you're navigating complex transit systems, translating menus, or sharing experiences in real time, staying connected is essential, which is why choosing the best eSIM for Japan can make your trip significant...
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Aug 11, 2026 — 9 min read
The Ultimate 14-Day Japan and South Korea Itinerary for 2026
Tokyo, Kyoto, Seoul, and Jeju Island form 2026's most searched Asia travel corridor, and this 14-day route covers all four without wasted travel days. It pairs a realistic day-by-day plan with the connectivity side most guides skip, including how to stay online during the Japan to South Korea ferry or flight switch using a regional eSIM instead of juggling two separate SIM cards. Why This Japan Korea Route is Trending for Summer 2026 Search interest in combined Japan and Korea trips has overt...
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Mar 30, 2026 — 21 min read
Japan's Sakura Grand Finale: Chasing the Last Bloom in Tohoku & Hokkaido (2026)
I. The 2026 Northern Forecast: Your Second Chance Has Arrived Right now, as you read this, something extraordinary is unfolding across the northern reaches of Japan. Tokyo's cherry blossoms those famously fleeting clouds of pink that flood Ueno Park and Shinjuku Gyoen with a million tourists have already peaked and are letting go. The petals are falling, the crowds are dispersing, and another Instagram-saturated Japan cherry blossom season is quietly closing its curtain in the south. But here'...
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