Head-to-head · Japan eSIM Plans
Saily vs IIJ Japan Travel SIM/Digital
Saily leads on 0 checks, IIJ Japan Travel SIM/Digital on 1, and 2 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreSaily · 8.7/10
Saily scores higher on our rubric for japan esim plans: 8.7 against 8.4 out of 10; our editors rank them #5 and #7.
IIJ Japan Travel SIM/Digital leads on validity: 30 days versus 7 days.
Saily is the better fit for travelers wanting security tools with their data plan. IIJ Japan Travel SIM/Digital is the better fit for travelers wanting large data bundles on Docomo LTE.
- Saily fits best
Travelers wanting security tools with their data plan
- IIJ Japan Travel SIM/Digital fits best
Travelers wanting large data bundles on Docomo LTE
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Side by side
| Feature | Saily 8.7/10 Visit ↗ | IIJ Japan Travel SIM/Digital 8.4/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 8.7 | 8.4 |
| Ranking | #5 in Japan eSIM Plans | #7 in Japan eSIM Plans |
| Best for | Travelers wanting security tools with their data plan | Travelers wanting large data bundles on Docomo LTE |
| Pricing model | Paid | Paid |
| Starting price | Not published | Not published |
| Free plan | — | — |
| Free trial | — | — |
| Deployment | Cloud, Mobile | Mobile |
| Platforms | Web, iOS, Android | iOS, Android |
| Support | Live chat, Email · 24/7 | Live chat, Phone · 24/7 |
| Built for | Solo, Small business | Solo, Small business |
| Features Saily 1/1 · IIJ Japan Travel SIM/Digital 1/1 | ||
| Hotspot support | ✓ | ✓ |
| Specs | ||
| Data type | Fixed | Fixed |
| Data allowance | 1 GB | 3 GB |
| Validity | 7 days | 30 days (best) |
| Coverage scope | Japan_only | Japan_only |
| Activation timing | First_connection | First_connection |
| Our review | ||
| Pros |
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| Cons |
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| Our verdict | Saily sells prepaid eSIM data plans for travelers in Japan, with fixed-data packages and an unlimited option. The plans suit visitors who want mobile data without choosing a local physical SIM, as well as travelers interested in security… Read the review → |
IIJ Japan Travel SIM/Digital is a prepaid, data-only eSIM for visitors to Japan and temporary returnees who want a fixed data allowance rather than voice or SMS service. Its seven 30-day options range from 3 GB to 55 GB and use Japan-wide… Read the review → |
Strengths and trade-offs
Saily — where it wins
- Japan plans range from 1 GB to unlimited data
- Hotspot sharing and in-app top-ups, including optional auto top-up
- Virtual location, ad blocking, and malicious-site protection
Where it doesn't
- Unlimited data slows to up to 1 Mbps after 5 GB per day at full speed
- Requires installing an eSIM and enabling data roaming
- Plan allowances and validity vary by package
IIJ Japan Travel SIM/Digital — where it wins
- Seven fixed-data options from 3 GB to 55 GB, each valid for 30 days
- Japan-wide NTT DOCOMO 4G LTE coverage
- Data can be recharged during the usage period
Where it doesn't
- Data-only service; no voice or SMS
- eSIM installation requires online registration after purchase
- Mobile support is limited to iOS and Android
- Saily8.7/10 · Paid
Prepaid Japan data from 1 GB to unlimited, with hotspot sharing and security features.
Visit SailyFull verdict → - IIJ Japan Travel SIM/Digital8.4/10 · Paid
A data-only Japan eSIM with 3–55 GB bundles and 30-day validity.
Visit IIJFull verdict →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update