An eSIM is the easiest way to get online in Japan: buy it at home, scan a QR code, and you’re connected the minute you land. Here’s how the popular options compare.
| Provider | Data | Validity | From (USD) | Best for |
|---|---|---|---|---|
| Airalo | 1–20 GB | 7–30 days | $4.50 | Flexibility & easy top-ups |
| Holafly | Unlimited | 5–90 days | $6.90/day | Heavy users & hotspot |
| Ubigi | 1–10 GB | 7–30 days | $3.00 | Cheap, light use |
Our picks
- Most travelers (best all-rounder): Airalo. Fair prices, simple app, and you can top up if you run low.
- Heavy users / want to tether: Holafly’s unlimited plans remove any “am I running out?” anxiety.
How to set it up
- Buy the plan before you fly (you’ll get a QR code by email).
- On arrival, go to Settings → Mobile/Cellular → Add eSIM and scan the code.
- Turn on data roaming for the eSIM line only, and set it as your data line.
That’s it — you’re online. Next: decide your transport with our JR Pass guide.