How much eSIM data for 14 days in Japan?
Maps, messages and typical social use are already in the “normal” setting. This is the same model as the calculator — not a live Japan price list.
Planning size for a two-week trip
For 14 days of normal daily use and no extra video, music or calls, TripUtils estimates 6–9 GB. A 10 GB Japan plan is the usual buffer. Add video and the range jumps; use the calculator instead of guessing.
| Habits | 14-day range | Planning size |
|---|---|---|
| Normal (maps, messages, social) | 6–9 GB | 10 GB |
| Normal + daily video | 14–21 GB | 20 GB may be enough; 30 GB is safer |
Hotel Wi‑Fi is not counted. Japan’s 100 V Type A/B sockets are a separate check on the plug checker.
Buy a Japan plan near that range
Open Saily or Airalo, choose Japan, and pick a size that covers the higher GB figure.
Simple app-based eSIM plans.
Large catalogue of destination eSIMs.
Common questions
Is 10 GB enough for two weeks in Japan?
For maps, messages and everyday social use, yes — that is the 6–9 GB estimate plus a buffer. Navigation and translation apps sit in that “normal” bucket. Streaming video on mobile is the usual reason to go larger.
Should I roam instead?
Only if your home plan’s daily roaming fee is cheap enough. Put that fee into the roaming vs eSIM tool and compare a prepaid plan for the same 14 days.
Do you show live Saily or Airalo prices?
No. Live Japan prices belong on the provider site. The numbers on this page are a data-size estimate only.