What breaks when you travel on a data-only eSIM — checked country by country.
Japan · Major food delivery platform
Not on a data-only eSIM.
Demae-can won’t register a number without a voice contract, so a data-only eSIM — which has no number at all — can’t get you in. Its help page doesn’t say whether a foreign number with voice calls is accepted, and we couldn’t confirm that either way.
固定電話番号や音声契約のない携帯電話番号はご登録いただけません
In English: “Landline numbers and mobile numbers without a voice contract cannot be registered.”
How sure we are
We read this in the company’s own published material.
Next check
By 6 Nov 2026. Apps change their sign-up rules without notice; if you see something different, tell us at [email protected].
| App | Data-only eSIM on its own | With your home SIM on | Basis |
|---|---|---|---|
| 出前館 (Demae-can) | Doesn’t work | Not confirmed | Company's own documentation |
| Uber Eats Japan | Doesn’t work (reported) | Works (reported) | Reported, not confirmed |
Won’t take a foreign number
Need a number that can receive a text
Work on a data-only eSIM on its own