Japan eSIM
Travel Japan with fast, reliable data. Every plan runs on KDDI.
6 plans
3 GB
Full speedRoaming on KDDI and SoftBank
฿89≈ $2.94
Buy at Vacay →5 GB
Full speedRoaming on KDDI and SoftBank
฿119≈ $3.93
Buy at Vacay →10 GB
Full speedRoaming on KDDI and SoftBank
฿209≈ $6.90
Buy at Vacay →20 GB
Full speedRoaming on KDDI and SoftBank
฿399≈ $13.17
Buy at Vacay →30 GB
Full speedRoaming on KDDI and SoftBank
฿539≈ $17.79
Buy at Vacay →50 GB
Full speedRoaming on KDDI and SoftBank
฿879≈ $29.01
Buy at Vacay →Prices from Vacay as of 8 Nov 2026. Prices may change, so check the latest price on the provider's page before you pay. Buy links are affiliate links, and you pay the same price.
US dollar prices use Vacay's rate (about ฿30.30 per $1, checked 12 Nov 2026), and buy buttons open Vacay in US dollars.
Japan eSIM prices by trip length
Vacay prices as of 8 Nov 2026. Pick your days and plan above to buy.
| Days | From | Recommended | Unlimited 10Mbps |
|---|---|---|---|
| 3 days | 3 GB฿79≈ $2.61 | 5 GB฿109≈ $3.60 | ฿169≈ $5.58 |
| 5 days | 3 GB฿89≈ $2.94 | 10 GB฿209≈ $6.90 | ฿269≈ $8.88 |
| 7 days | 3 GB฿99≈ $3.27 | 20 GB฿409≈ $13.50 | ฿369≈ $12.18 |
| 10 days | 3 GB฿109≈ $3.60 | 20 GB฿449≈ $14.82 | ฿519≈ $17.13 |
| 15 days | 3 GB฿129≈ $4.26 | 30 GB฿669≈ $22.08 | ฿1,059≈ $34.95 |
| 30 days | 3 GB฿149≈ $4.92 | 50 GB฿1,129≈ $37.26 | ฿2,109≈ $69.60 |
New Vacay customers: 10% off
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Free Easy travel insurance
Free Easy cover up to THB 50,000 · select Easy before departureCompare plans →Not sure how much data you need?
Estimate data for your Japan tripEstimate my data →Already in Japan and need data now
Quick connection steps
- Connect to Wi-FiUse hotel, airport or café Wi-Fi.
- Buy and get your QRPay for a plan, then open the QR from your email.
- Add your eSIMScreenshot the email QR, then add the eSIM from your phone gallery.
- Turn on data roamingSelect the eSIM for mobile data and enable roaming.
Japan eSIM tips
- You can scan the QR and install the eSIM in Thailand before you fly. Every plan on this page starts counting days when you arrive in Japan, and must be activated within 60 days of purchase.
- Moderate use is about 1.5 GB a day: 10 GB for a 5-day trip, 20 GB for 7–10 days. If you don't want to count data, or you watch a lot of video, pick Unlimited.
- The GB plans and Best Unlimited roam on KDDI and SoftBank and allow hotspot sharing. KDDI Unlimited is a local SIM on KDDI au, with hotspot limited by plan length, for example 10 GB on an 11-day plan.
- KDDI Unlimited resets at midnight Japan time, so if you land in the evening your first day has only a few hours left. Best plans count a full 24 hours from first use.
Read before you go
- Japan eSIM for tourists: KDDI, Docomo, SoftBank or roaming? Unlimited data or by the GB, 5 to 10 daysFlying from Thailand to Japan? Compare Japan eSIMs on every network: KDDI au, Docomo, SoftBank and roaming plans that use two networks. Unlimited vs by the GB vs daily, which ones slow down, which don't work on iPad or Pixel, and what each costs for a 5, 7 or 10-day trip.
- Get Thai bank OTP codes while traveling: keep your AIS, True or dtac number on, use a travel eSIM for data
eSIMs for other destinations
See all destinationsJapan eSIM questions
How much does a Japan eSIM cost?
For data by the GB, Best Japan starts at ฿79 for 3GB for 3 days, or ฿119 for 5GB for 5 days. For Unlimited 10 Mbps, KDDI Unlimited is ฿169 for 3 days, ฿269 for 5 and ฿369 for 7. For stays of 15 days or more, Best Japan Unlimited is ฿1,059 for 15 days. New Vacay customers get 10% off with THAF-UCQY.
Is there a Japan unlimited eSIM without throttling?
Unlimited 10 Mbps plans give unlimited data at 10 Mbps. KDDI Unlimited says there is no FUP. Best Japan Unlimited says speeds may be reduced for unusually heavy use. Both allow hotspot sharing, but KDDI limits it to the number of days minus one: a 5-day plan allows 4GB.
Which network should I choose for a Japan eSIM?
You do not need to choose a network yourself. Every plan on this page can use KDDI au. KDDI Unlimited is a local SIM on KDDI au. Best Japan and Best Japan Unlimited roam and automatically connect to KDDI au or SoftBank with one SIM.
Can I use it on an iPad or Google Pixel?
Vacay's pages for all three plans do not list restrictions for iPad or Google Pixel. Your device must support eSIM and be unlocked. An iPad must be a Cellular model.