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Japan eSIM Plans
24 plans · from $3.52
Japan runs some of the fastest mobile networks in the world. eSIM is the simplest way to stay connected without navigating Japanese carrier registration in a foreign language. Learn more about how eSIMs work →
→Read our Japan eSIM guide — Shinkansen coverage, pocket Wi-Fi comparison, Docomo vs SoftBank, and data tipsChoose a data plan
1 GB
7 days· 0.4 GB per $1
$3.52
★ BEST VALUE
Unlimited
1 days· ∞ GB per $1
$3.76
2 GB
15 days· 0.4 GB per $1
$5.45
3 GB
30 days· 0.5 GB per $1
$7.11
Unlimited
3 days· ∞ GB per $1
$8.55
5 GB
30 days· 0.6 GB per $1
$10.34
Unlimited
5 days· ∞ GB per $1
$13.33
10 GB
30 days· 0.7 GB per $1
$15.75
Unlimited
7 days· ∞ GB per $1
$18.13
20 GB
30 days· 0.9 GB per $1
$25.31
Unlimited
10 days· ∞ GB per $1
$25.31
Unlimited
15 days· ∞ GB per $1
$37.28
Frequently asked questions
Do I need a physical SIM card to use mobile data in Japan?
No. A Siima eSIM gives you local data in Japan without a physical card. Activate by scanning a QR code in your phone's settings — no shop visit, no passport check required.
How do I activate my eSIM when I arrive in Japan?
Install the eSIM before you travel: open Settings → Cellular → Add eSIM and scan the QR code from your Siima confirmation email. Your data activates automatically when you first use mobile data in Japan.
How much data do I need for a trip to Japan?
For light use (maps, messaging, email) 1–3 GB per week is usually enough. For streaming or heavy navigation, choose a 5 GB+ plan. You can buy additional plans at any time if you run low.
Is eSIM cheaper than international roaming in Japan?
Almost always yes. International roaming from most home carriers costs $10–15 per day. Siima eSIM plans for Japan start from $3.52 and cover days or weeks of local data.