Plans and prices for Japan
There are 7 fixed-data plans for Japan, from $2.39. The lowest price per GB is $1.30: 20 GB for 30 days.
Prices are in US dollars. The final price is shown at checkout.
| Data | Validity | Price | Price per GB |
|---|---|---|---|
| 500 MB | 7 days | $2.39 | $4.89 |
| 1 GB | 7 days | $4.43 | $4.43 |
| 2 GB | 15 days | $7.00 | $3.50 |
| 3 GB | 30 days | $8.52 | $2.84 |
| 5 GB | 30 days | $11.59 | $2.32 |
| 10 GB | 30 days | $18.75 | $1.88 |
| 20 GB | 30 days | $25.91 | $1.30 |
Unlimited data for Japan
Unlimited plans start at $12.11. Each includes 3 GB of high-speed data per day; after that, speed is reduced to 1 Mbps.
| Validity | Price | High-speed data | After that |
|---|---|---|---|
| 3 days | $12.11 | 3 GB per day | 1 Mbps |
| 5 days | $17.73 | 3 GB per day | 1 Mbps |
| 7 days | $27.45 | 3 GB per day | 1 Mbps |
| 10 days | $35.64 | 3 GB per day | 1 Mbps |
| 15 days | $49.44 | 3 GB per day | 1 Mbps |
| 30 days | $70.92 | 3 GB per day | 1 Mbps |
Network: KDDI and SoftBank
Plans for Japan connect to the KDDI or SoftBank network, depending on the plan. Check the network shown on a plan before you buy.
Calls, SMS and phone numbers
Plans for Japan are data-only: they don’t include a phone number, carrier calls or SMS. If you need a separate number for calls and texts, the DualLine second line is a different product.
Local facts for Japan
General information about mobile networks in Japan; not specific to DualLine plans.
Japan has four mobile network operators: NTT Docomo, KDDI (au), SoftBank and Rakuten Mobile. Source: International Trade Administration, U.S. Department of Commerce.
Docomo, au and SoftBank launched commercial 5G on 25–27 March 2020, starting in limited areas. Source: International Trade Administration, U.S. Department of Commerce.
NTT Docomo shut down its 3G (FOMA) network on 31 March 2026. Docomo says 3G-only phones, and 4G phones without VoLTE, can no longer make calls on its network. Source: NTT Docomo.
Set up before you travel
Install the eSIM over Wi-Fi before you leave, then switch mobile data to it when you arrive in Japan.
More eSIM destinations
Compare plans for other popular destinations, or start with the travel eSIM guide.
Your take-away checklist
- Pick a plan: 500 MB–20 GB or unlimited data, valid 3–30 days.
- Check that your phone supports eSIM and is unlocked.
- Install the eSIM over Wi-Fi before you travel.
- After you arrive, choose the eSIM for mobile data.
Common questions
How much does an eSIM for Japan cost?
Plans start at $2.39 (500 MB for 7 days). 1 GB for 7 days costs $4.43. The lowest price per GB is $1.30: 20 GB for 30 days. The final price is shown at checkout.
Is there an unlimited data eSIM for Japan?
Yes. Unlimited plans start at $12.11 for 3 days. Each includes 3 GB of high-speed data per day; after that, speed is reduced to 1 Mbps.
Which mobile network will I use in Japan?
KDDI or SoftBank, depending on the plan. Check the network shown on a plan before you buy.
Does the eSIM for Japan include calls, SMS or a phone number?
No. Plans for Japan are data-only. If you need a separate number for calls and texts, see the DualLine second line.
How long are eSIM plans for Japan valid?
Plans are valid for 3 to 30 days. Check when validity starts: on some plans it starts at installation, on others when the eSIM first connects.
When should I install the eSIM for Japan?
Install it over Wi-Fi before you leave, then switch it on for mobile data when you arrive.
Sources and support
Plan prices come from DualLine’s catalogue. Local facts link to the source we checked.