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.
Code ESIMP
eSIM AdventureSIMs Japan 2026: best data plans, code ESIMP (-10%)
Save up to 10% on your AdventureSIMs eSIM for Japan. Exclusive verified offer.
About AdventureSIMs
AdventureSIMs is an eSIM provider for travel to Japan. Adventure plans
Best-value AdventureSIMs plan for Japan
Not sure which eSIM plan to choose for Japan? We'll hand-pick the best ones just for you
Personalised selection with promo codes & direct links, then reminders before you leave
All eSIM plans for Japan by AdventureSIMs in 2026
20 plans found · Last update:
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| # | Plan | Data | Duration | Price/GB | Code | Price | Action |
|---|---|---|---|---|---|---|---|
1 |  Japan 1GB 7 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage:  | 1.00GB | 7 days | $1.78 | -10% | $1.78$1.98 | |
2 | Japan 3GB 15 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 3.00GB | 15 days | $0.99 | -10% | $2.97$3.30 | |
3 | Japan 3GB 30 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 3.00GB | 30 days | $1.19 | -10% | $3.56$3.96 | |
4 | Japan 5GB 30 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 5.00GB | 30 days | $0.95 | -10% | $4.75$5.28 | |
5 | Asia (20 areas) 1GB 7 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 1.00GB | 7 days | $6.53 | -10% | $6.53$7.26 | |
6 | Global (120 areas) 1GB 7 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 1.00GB | 7 days | $8.32 | -10% | $8.32$9.24 | |
7 | Japan 10GB 30 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 10.00GB | 30 days | $0.83 | -10% | $8.32$9.24 | |
8 | Japan 5GB 1 Day5G AdventureSIMsKDDI/au Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 5.00GB | 1 days | $1.54 | -10% | $7.72$8.58 | |
9 | Japan 20GB 30 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 20.00GB | 30 days | $0.62 | -10% | $12.48$13.87 | |
10 | Asia (20 areas) 3GB 15 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 3.00GB | 15 days | $4.36 | -10% | $13.07$14.53 | |
11 | Asia (20 areas) 3GB 30 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 3.00GB | 30 days | $4.56 | -10% | $13.67$15.19 | |
12 | Global (120 areas) 3GB 30 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 3.00GB | 30 days | $5.75 | -10% | $17.24$19.15 | |
13 | Asia (20 areas) 5GB 30 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 5.00GB | 30 days | $4.04 | -10% | $20.21$22.45 | |
14 | Japan 50GB 30 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 50.00GB | 30 days | $0.42 | -10% | $20.80$23.11 | |
15 | Global (120 areas) 5GB 30 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 5.00GB | 30 days | $4.40 | -10% | $21.99$24.44 |
#1
5GJapan 1GB 7 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
1.00GB
Duration
7 days
Price/GB
$1.78
Code-10% With discount
$1.78
$1.98
#2
5GJapan 3GB 15 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
3.00GB
Duration
15 days
Price/GB
$0.99
Code-10% With discount
$2.97
$3.30
#3
5GJapan 3GB 30 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
3.00GB
Duration
30 days
Price/GB
$1.19
Code-10% With discount
$3.56
$3.96
#4
5GJapan 5GB 30 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
5.00GB
Duration
30 days
Price/GB
$0.95
Code-10% With discount
$4.75
$5.28
#5
5GAsia (20 areas) 1GB 7 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
1.00GB
Duration
7 days
Price/GB
$6.53
Code-10% With discount
$6.53
$7.26
#6
5GGlobal (120 areas) 1GB 7 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
1.00GB
Duration
7 days
Price/GB
$8.32
Code-10% With discount
$8.32
$9.24
#7
5GJapan 10GB 30 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
10.00GB
Duration
30 days
Price/GB
$0.83
Code-10% With discount
$8.32
$9.24
#8
5GJapan 5GB 1 Day
AdventureSIMs · KDDI/au
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
5.00GB
Duration
1 days
Price/GB
$1.54
Code-10% With discount
$7.72
$8.58
#9
5GJapan 20GB 30 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
20.00GB
Duration
30 days
Price/GB
$0.62
Code-10% With discount
$12.48
$13.87
#10
5GAsia (20 areas) 3GB 15 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
3.00GB
Duration
15 days
Price/GB
$4.36
Code-10% With discount
$13.07
$14.53
#11
5GAsia (20 areas) 3GB 30 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
3.00GB
Duration
30 days
Price/GB
$4.56
Code-10% With discount
$13.67
$15.19
#12
5GGlobal (120 areas) 3GB 30 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
3.00GB
Duration
30 days
Price/GB
$5.75
Code-10% With discount
$17.24
$19.15
#13
5GAsia (20 areas) 5GB 30 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
5.00GB
Duration
30 days
Price/GB
$4.04
Code-10% With discount
$20.21
$22.45
#14
5GJapan 50GB 30 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
50.00GB
Duration
30 days
Price/GB
$0.42
Code-10% With discount
$20.80
$23.11
#15
5GGlobal (120 areas) 5GB 30 Days
AdventureSIMs · NTT docomo
Compatible apps
WhatsAppMapsInstagramTikTok+6
Coverage:
Data
5.00GB
Duration
30 days
Price/GB
$4.40
Code-10% With discount
$21.99
$24.44
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 eSIMPlanet to compare plans clearly and honestly. Every article is carefully written and reviewed to save you time and money.
Why choose AdventureSIMs for Japan?
AdventureSIMs is a reliable eSIM provider for Japan. With 20 plans from $1.78, you can pick what fits your trip.
Plans from $1.78 for Japan
Instant QR activation
Solid 4G/5G coverage
Responsive support
Keep your main number on the primary SIM
No hidden fees
FAQ AdventureSIMs and Japan
What coverage does AdventureSIMs offer in Japan?
AdventureSIMs uses local networks for strong 4G/LTE; 5G depends on the network and your device.
How much is a AdventureSIMs eSIM for Japan?
Plans start from $1.78. Prices on eSIMPlanet are refreshed regularly.
Can I activate when I land in Japan?
Yes. Install before travel if you like, then activate once you connect to the local network.
How do I activate my AdventureSIMs eSIM?
After purchase, scan the QR from email (Settings > Cellular > Add eSIM on iPhone).
Does AdventureSIMs cover more than Japan?
AdventureSIMs also sells regional or global plans. Check included destinations before buying.
Looking for the best AdventureSIMs eSIM plans for Japan in 2026? eSIMPlanet compares live offers from $1.78, with activation in minutes.
AdventureSIMs uses dependable local networks in Japan, ideal for leisure or business without painful roaming charges.
Clear pricing, QR activation, and app management: travel light and keep your primary number on the physical SIM.
Verified promo: enter ESIMP at checkout on AdventureSIMs for 10% off (tested by eSIMPlanet).
