eSIM Japan: Prepaid Data Plans
Japan eSIM plans start at $3.99 for 1 GB; our top plan for Japan alone is 50 GB for 30 days at $29.99 (IIJ), 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 (77 plans from 7 vetted providers).
A typical GB here costs $1.00, about 40% below the Asia median.
Japan eSIM at a glance
MobiMatter Rewards
EXCLUSIVE
Get up to $5 for every friend referred
MobiMatter Rewards
EXCLUSIVE
Get 10% cashback with every purchase
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
Do I need an eSIM for Japan, or is pocket WiFi better?
You need neither, but most visitors want mobile data for maps and trains. An eSIM is the simplest: nothing to collect, carry, charge or return, and it works on your own phone from landing. Pocket WiFi suits groups sharing one connection, but everyone has to stay near the device. Free Wi-Fi is common in cities but patchy elsewhere.
Reviewed Oct 6, 2026 · Source
How much data do I need for a trip to Japan?
For maps, messaging and browsing, a common rule of thumb is 0.5 to 1 GB a day, so 10 GB covers about a week and 20 GB about two weeks. Video uses far more: Netflix lists up to 3 GB per hour in HD. If you stream or share your connection, choose a larger or unlimited plan.
Reviewed Oct 6, 2026 · Source
Should I buy my Japan eSIM before I fly or at the airport?
Buy it online before you fly, so you can install it at home over Wi-Fi and have data the moment you land. Japan's main airports have free Wi-Fi and counters selling SIM cards and renting pocket WiFi, but an eSIM installed in advance saves queueing on arrival.
Reviewed Oct 6, 2026 · Source
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 7 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, au (KDDI), NTT docomo, and Rakuten; 5G plans are available on SoftBank, au (KDDI), NTT docomo, 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 50 GB for 30 days at $29.99 from IIJ. 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.
Is there an unlimited data eSIM for Japan?
Yes. Unlimited data plans for Japan start at $10.99. 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 38 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.
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 77 plans from 7 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
"I have been using the Sparks eSim from MobiMatter for some time now and I won't be deleting it. Since then, I have traveled to Egypt, Bangladesh, India, Indonesia, Singapore, Brazil, and Argentina. It was easy to install, and the reception has always been flawless!"
Translated from German
MMatthsh
App Store5.0
I've tried so many esim apps, but MobiMatter is always the cheapest and with the best overall packages. Great customer service as well. Highly recommended!
TTorbjornhb
App Store5.0
Been using Mobimaater more than 2 years, Best prices available and coverage for most countries and very fast and responsive support, i highly recommended
HHussain AJ
Play Store5.0
Excellent and very responsive customer support! They helped me step-by-step to resolve my eSIM activation and APN configuration issues. The data speed and coverage in Oman are great. Highly recommended
MMahmoud qatanani
Play Store5.0
I'm using this app for the third time, I really like it, the network is stable in Turkey
Translated from Russian
ДДарья Сергеева
Play Store5.0
I've tried a few eSIM apps and MobiMatters is the best. They have real customer support, lots of packages, and the service has worked very well in Australia, Singapore, Montenegro and other places. I highly recommend them.
FForTheLoveOfGodIsThisTakenToo
App Store5.0
Great coverage and great support as well. All recommendations for app
SSimospremo
App Store5.0
Excellent technical service. I had a problem installing the eSIM, and their technical support resolved it for me. I had great communication with them via email. They were always attentive! I highly recommend them. The connection was excellent!
OOmar Barrera
Play Store5.0
Amazing discounts app, all countries supported with competitive prices
AAlways Keep It Open
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...
Read more
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...
Read more
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'...
Read more