Best eSIM for Japan in 2026: Complete Comparison & Guide
Discover the best eSIM plans for traveling to Japan. Detailed comparison with real prices, exclusive promo codes, and recommendations by travel profile.
All eSIM plans for Japan by AdventureSIMs in 2026
13 plans found · Last update:
| # | Plan | Data | Duration | Price/GB | Promo code | Price |
|---|---|---|---|---|---|---|
1 |  Japan 1GB 7 Days5G AdventureSIMsKDDI/au | 1.00GB | 7 days | $1.18 | -10% | $1.18$1.31 |
2 | Japan 3GB 15 Days5G AdventureSIMsKDDI/au | 3.00GB | 15 days | $0.99 | -10% | $2.97$3.30 |
3 | Japan 3GB 30 Days5G AdventureSIMsKDDI/au | 3.00GB | 30 days | $1.19 | -10% | $3.56$3.96 |
4 | Japan 5GB 30 Days5G AdventureSIMsKDDI/au | 5.00GB | 30 days | $1.19 | -10% | $5.94$6.60 |
5 | Global (120 areas) 1GB 7 Days5G AdventureSIMsNTT docomo | 1.00GB | 7 days | $7.13 | -10% | $7.13$7.92 |
6 | Japan 5GB 1 Day5G AdventureSIMsKDDI/au | 5.00GB | 1 days | $1.43 | -10% | $7.13$7.92 |
7 | Japan 10GB 30 Days5G AdventureSIMsKDDI/au | 10.00GB | 30 days | $0.89 | -10% | $8.91$9.90 |
8 | Japan 20GB 30 Days5G AdventureSIMsKDDI/au | 20.00GB | 30 days | $0.77 | -10% | $15.45$17.17 |
9 | Global (120 areas) 3GB 30 Days5G AdventureSIMsNTT docomo | 3.00GB | 30 days | $5.94 | -10% | $17.83$19.81 |
10 | Japan 50GB 30 Days5G AdventureSIMsKDDI/au | 50.00GB | 30 days | $0.48 | -10% | $23.78$26.42 |
11 | Global (120 areas) 5GB 30 Days5G AdventureSIMsNTT docomo | 5.00GB | 30 days | $4.76 | -10% | $23.78$26.42 |
12 | Japan 50GB 180 Days5G AdventureSIMsKDDI/au | 50.00GB | 180 days | $0.71 | -10% | $35.67$39.63 |
13 | Global (120 areas) 10GB 30 Days5G AdventureSIMsNTT docomo | 10.00GB | 30 days | $4.16 | -10% | $41.61$46.24 |
#1
5GJapan 1GB 7 Days
AdventureSIMs · KDDI/au
Data
1.00GB
Duration
7 days
Price/GB
$1.18
Promo code-10% With promo
$1.18
$1.31
#2
5GJapan 3GB 15 Days
AdventureSIMs · KDDI/au
Data
3.00GB
Duration
15 days
Price/GB
$0.99
Promo code-10% With promo
$2.97
$3.30
#3
5GJapan 3GB 30 Days
AdventureSIMs · KDDI/au
Data
3.00GB
Duration
30 days
Price/GB
$1.19
Promo code-10% With promo
$3.56
$3.96
#4
5GJapan 5GB 30 Days
AdventureSIMs · KDDI/au
Data
5.00GB
Duration
30 days
Price/GB
$1.19
Promo code-10% With promo
$5.94
$6.60
#5
5GGlobal (120 areas) 1GB 7 Days
AdventureSIMs · NTT docomo
Data
1.00GB
Duration
7 days
Price/GB
$7.13
Promo code-10% With promo
$7.13
$7.92
#6
5GJapan 5GB 1 Day
AdventureSIMs · KDDI/au
Data
5.00GB
Duration
1 days
Price/GB
$1.43
Promo code-10% With promo
$7.13
$7.92
#7
5GJapan 10GB 30 Days
AdventureSIMs · KDDI/au
Data
10.00GB
Duration
30 days
Price/GB
$0.89
Promo code-10% With promo
$8.91
$9.90
#8
5GJapan 20GB 30 Days
AdventureSIMs · KDDI/au
Data
20.00GB
Duration
30 days
Price/GB
$0.77
Promo code-10% With promo
$15.45
$17.17
#9
5GGlobal (120 areas) 3GB 30 Days
AdventureSIMs · NTT docomo
Data
3.00GB
Duration
30 days
Price/GB
$5.94
Promo code-10% With promo
$17.83
$19.81
#10
5GJapan 50GB 30 Days
AdventureSIMs · KDDI/au
Data
50.00GB
Duration
30 days
Price/GB
$0.48
Promo code-10% With promo
$23.78
$26.42
#11
5GGlobal (120 areas) 5GB 30 Days
AdventureSIMs · NTT docomo
Data
5.00GB
Duration
30 days
Price/GB
$4.76
Promo code-10% With promo
$23.78
$26.42
#12
5GJapan 50GB 180 Days
AdventureSIMs · KDDI/au
Data
50.00GB
Duration
180 days
Price/GB
$0.71
Promo code-10% With promo
$35.67
$39.63
#13
5GGlobal (120 areas) 10GB 30 Days
AdventureSIMs · NTT docomo
Data
10.00GB
Duration
30 days
Price/GB
$4.16
Promo code-10% With promo
$41.61
$46.24
Written and reviewed by
Valentin FourierDigital Nomad
Developer and digital nomad, I lived between Canada and the United States before continuing to explore the world. After struggling with internet connectivity abroad one too many times, I created eSIM Planet to compare plans clearly and honestly. Every article is carefully written and reviewed to save you time and money.
How to use the AdventureSIMs promo code for Japan?
1
Choose your plan
Select the AdventureSIMs plan that fits your needs for your trip to Japan.
2
Go to checkout
Click "View offer" to be redirected to the official AdventureSIMs website.
3
Enter code ESIMP
In the "Promo code" field, enter exactly ESIMP to get 10% off.
4
Activate your eSIM
Complete the purchase and receive your QR code by email. Scan it to activate your Japan eSIM.
Why choose AdventureSIMs for Japan?
AdventureSIMs is one of the most reliable eSIM providers for Japan. With 13 plans available from $1.19, you'll find the perfect offer for your stay.
Plans from $1.19 for Japan
Instant QR code activation
Quality 4G/5G coverage
Responsive customer support
Keep your home phone number
No hidden fees
FAQ about AdventureSIMs Japan
Is the AdventureSIMs promo code valid for Japan in 2026?
Yes, code ESIMP is valid and verified for Japan in 2026. It gives you 10% off all AdventureSIMs plans for Japan.
What network coverage does AdventureSIMs offer in Japan?
AdventureSIMs partners with top local carriers in Japan to provide optimal 4G/LTE coverage. In major cities, you often get 5G depending on your device.
How much does a AdventureSIMs eSIM for Japan cost?
AdventureSIMs plans for Japan start from $1.19. With code ESIMP, you get an additional 10% discount.
Can I use my AdventureSIMs eSIM as soon as I arrive in Japan?
Yes, you can install your AdventureSIMs eSIM before departure and activate it upon arrival in Japan. Activation is instant once connected to the local network.
How do I activate my AdventureSIMs eSIM for Japan?
After purchase, you'll receive a QR code by email. Scan it in your phone settings (Settings > Cellular > Add eSIM Plan on iPhone). Activation takes less than 5 minutes.
Looking for a AdventureSIMs eSIM for your trip to Japan in 2026? You're in the right place. eSIM Planet presents all AdventureSIMs plans available for Japan, with the best prices and exclusive promo code ESIMP for 10% off.
AdventureSIMs is known for quality service and network coverage in Japan. Whether traveling for tourism or business, AdventureSIMs plans keep you connected without exorbitant roaming fees from your home carrier.
The advantage of choosing a AdventureSIMs eSIM for Japan? Instant activation, transparent prices from $1.19, and the ability to keep your home number. No need to search for a SIM shop at the airport or wait for delivery.
