For solo travelers with a recent phone, an eSIM is now the default. Groups sharing data may still prefer pocket WiFi.
Side-by-side comparison
| Option | Typical cost (7 days) | Best for | Downside |
|---|---|---|---|
| Travel eSIM | ¥1,500–¥4,500 | Solo, couples | Phone must be unlocked |
| Pocket WiFi | ¥4,000–¥7,000 | Families, groups, laptops | Device to carry & charge, return |
| Physical SIM | ¥2,500–¥5,000 | Older phones | Lose home number |
| Home roaming | ¥0–¥14,000 | Very short trips | Can be expensive |
Speed
All run on Docomo, au or SoftBank 4G/5G; speed differences are small in cities.
Our pick
eSIM with 10–20 GB for a two-week trip; one pocket WiFi for a family of four.
Plan it with our free tools
Price your route with the Shinkansen Fare Calculator, check the JR Pass Calculator, set a daily spend in the Budget Calculator, and convert prices in 30 currencies with the Yen Converter.
Frequently asked questions
Is eSIM better than pocket WiFi in Japan?
For most solo travelers yes — cheaper, no device to return.
Do I need a Japanese phone number?
Rarely; data-only works for maps, translation and messaging.
Will my phone support eSIM?
iPhone XS and later and most recent Android flagships do, if carrier-unlocked.
Is free WiFi common?
Yes in stations and convenience stores, but unreliable for navigation.
Official sources & further reading
Rules, prices and schedules change. Confirm details here before you travel: