🇯🇵 how much data esim japan
Japan eSIM
No GB to pick upfront. Top up the wallet, use data in Japan as you need it; afterwards we count what you actually used and charge whichever math comes out cheapest.
Get started →What a trip here roughly costs
Estimated over 6 days at about 1.2 GB a day — 7.2 GB total. An illustrative trip, not a commitment: you never have to decide upfront.
The gap comes from us combining plans for you. It is not a discount — it is two ways of pricing the same usage, and we charge the lower one.
- Lowest threshold
- $3.50 / 1 GB
- Per-GB rate
- $4.50 / GB
Your actual amount depends on what you actually use, settled over a 30-day window at the tariff disclosed before payment.
One wallet, no country to choose
There is no such thing as a "Japan plan" at soda. The same wallet works everywhere we cover — this page just spells out what Japan actually looks like.
What the line actually looks like in Japan
Public data we compiled from the line catalogue: exit locations and host carriers. Snapshot dated 2026-08-21.
| Host carrier | Best network |
|---|---|
| KDDI/au | 5G |
| NTT docomo | 5G |
| Rakuten Mobile | 5G |
| SoftBank | 5G |
| Exit | ChatGPT | TikTok | LINE | ||
|---|---|---|---|---|---|
| Hong Kong | ✓ Available probed 2026-08-21 | ✓ Available probed 2026-08-21 | ✓ Available inferred — pending sample check | ✓ Available probed 2026-08-21 | ✓ Available inferred — pending sample check |
| Japan | ✓ Available inferred — pending sample check | ✓ Available inferred — pending sample check | ✓ Available inferred — pending sample check | ✓ Available inferred — pending sample check | ✓ Available inferred — pending sample check |
| Singapore | ✓ Available inferred — pending sample check | ✓ Available inferred — pending sample check | ✓ Available inferred — pending sample check | ✓ Available inferred — pending sample check | ✓ Available inferred — pending sample check |
The full Japan guide
The guide covers which kind of connection to pick, how much data to expect, and what it is actually like on the ground.
Best eSIM for Japan: the complete guide
Read the Japan eSIM guide →Common questions
How many GB for five days in Japan?
Don't decide upfront. Use Maps, catch trains, send photos — whatever you need. We only count what you actually used afterwards, then pick the cheapest math.
Will leftover data go to waste?
It can't, because there's no 'buy X GB' with soda. You pay for what you used; the rest stays your money and never expires.
Is the network reliable in Japan?
We run on the local carrier's proper line and put stability first. For the same money, soda gives you a smooth connection.