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
Unlimited
1 days· ∞ GB per $1
Fair use: 1 GB/day at full 4G/5G speed, then 512 kbps until the daily reset — still fine for messaging, maps, email and light browsing. No total cap — the eSIM is never cut off.
$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
Fair use: 1 GB/day at full 4G/5G speed, then 512 kbps until the daily reset — still fine for messaging, maps, email and light browsing. No total cap — the eSIM is never cut off.
$8.55
5 GB
30 days· 0.6 GB per $1
$10.34
Unlimited
5 days· ∞ GB per $1
Fair use: 1 GB/day at full 4G/5G speed, then 512 kbps until the daily reset — still fine for messaging, maps, email and light browsing. No total cap — the eSIM is never cut off.
$13.33
10 GB
30 days· 0.7 GB per $1
$15.75
Unlimited
7 days· ∞ GB per $1
Fair use: 1 GB/day at full 4G/5G speed, then 512 kbps until the daily reset — still fine for messaging, maps, email and light browsing. No total cap — the eSIM is never cut off.
$18.13
20 GB
30 days· 0.9 GB per $1
$25.31
Unlimited
10 days· ∞ GB per $1
Fair use: 1 GB/day at full 4G/5G speed, then 512 kbps until the daily reset — still fine for messaging, maps, email and light browsing. No total cap — the eSIM is never cut off.
$25.31
Unlimited
15 days· ∞ GB per $1
Fair use: 1 GB/day at full 4G/5G speed, then 512 kbps until the daily reset — still fine for messaging, maps, email and light browsing. No total cap — the eSIM is never cut off.
$37.28
How “Unlimited” works: 1 GB/day at full 4G/5G speed, then 512 kbps until the daily reset — still fine for messaging, maps, email and light browsing. No total cap — the eSIM is never cut off.Read more
Siima's Unlimited plans include 1 GB of full-speed 4G/5G data every 24 hours. Once that daily 1 GB is used, your connection is slowed to 512 kbps for the rest of that 24-hour window — still usable for messaging, maps, email and light browsing, but not video streaming or video calls. The full-speed allowance resets every 24 hours, timed from when you first activate the eSIM, for the entire duration of the plan. There is no total data limit and your eSIM is never disconnected — only the speed changes after 1 GB in a day. If you'd rather have every gigabyte at full speed with no daily limit, choose a fixed-GB plan instead.
Also covered by regional plans
Visiting more than one country? These multi-country eSIMs include Japan and keep working as you cross borders.