Japan eSIM comparison
Airalo may suit travelers who already use its app, want several fixed-data and short-duration unlimited-labelled packages, or want to compare regional and global options. Ubigi may suit travelers who prefer a reusable eSIM profile and Smartstart activation on supported plans. The better choice depends on the exact package, activation policy, Fair Use terms, hotspot needs, and current price -- always verify the latest details on each provider's official site.
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This comparison is based on current provider information, official support documentation, and Japan X Trip's editorial comparison criteria. Japan X Trip has not yet completed independent real-world network tests of these services.
At a glance
These providers are not numbered by quality. Compare the exact package rather than the brand name.
| Factor | Airalo | Ubigi |
|---|---|---|
| Product | Travel eSIM | Travel eSIM |
| Best starting point for | Existing Airalo users and broad package comparison | Reusable eSIM and current Japan plan comparison |
| Device requirement | Unlocked eSIM-compatible device | Unlocked eSIM-compatible device |
| Physical pickup | Not required | Not required |
| Main limitation | Package terms vary by product | Compatibility and plan-specific terms |
| Full review | Read the review | Read the review |
Provider comparison
Travel eSIM
Airalo may suit travelers who want to purchase and install a digital Japan data plan before departure without collecting a physical product.
Travel eSIM
Ubigi is another digital eSIM option for travelers comparing prepaid mobile-data plans for Japan.
Match your trip
These are general starting points, not a guarantee of the best option for every situation.
Compare each provider's package size, activation process, and app experience before choosing.
Verify: exact activation policy for your selected package.
eSIM Compatibility CheckerCompare current package validity and pricing for shorter trips on each provider's official site.
Verify: current plan validity -- do not assume one package stays available.
Airalo reviewCompare larger data allowances, top-up options, and renewal terms for longer stays.
Verify: renewal and top-up rules for your selected plan.
Data CalculatorCompare hotspot support and full-speed data allowances before relying on either eSIM for tethering.
Verify: hotspot conditions and Fair Use terms.
eSIM vs Pocket WiFiCompare each provider's local, regional, and global package options if you're visiting more than Japan.
Verify: package coverage for your full itinerary.
Best eSIM for JapanNeither eSIM works on a locked or non-eSIM phone -- compare a physical SIM or Pocket Wi-Fi instead.
Verify: your phone's unlock and eSIM status.
Ubigi reviewConsider another option
Your phone is locked or doesn't support eSIM
Check compatibilityYour family needs one shared connection
Pocket Wi-Fi guideYou want Japan-focused physical support
Sakura Mobile reviewYou're new to eSIM and want the basics first
Japan eSIM guideFAQ
Neither is universally better. Airalo may suit travelers who already use its app or want several fixed-data options, while Ubigi may suit travelers who prefer a reusable eSIM and Smartstart activation on supported plans. Compare both current reviews and package details before deciding.
Pricing depends on the exact package, data allowance, and validity period, which can change. Compare the current prices for equivalent packages on each provider's official site before purchasing.
Both providers offer unlimited-labelled packages, but Fair Use conditions such as full-speed allowance and reduced-speed thresholds can differ by exact plan. Review the current Fair Use terms for the specific package you're considering.
Activation timing and process are package-specific for both providers. Confirm the exact activation policy for your selected package on the official website before purchasing.
Hotspot support can depend on your device and the selected package for either provider. Check the current plan conditions before purchasing if hotspot use is important for your trip.
Many packages from both providers are positioned as data-only. Confirm the exact Plan Type for your selected package on the official website before purchasing.
A carrier-locked phone generally cannot use either provider's eSIM. Confirm your phone's unlock status with your home carrier, or check compatibility using Japan X Trip's eSIM Compatibility Checker.
This comparison is based on current provider information, official support documentation, and Japan X Trip's editorial comparison criteria. Japan X Trip has not yet completed independent real-world network tests of these services.
Still deciding?
Answer a few questions about your phone, trip length, and data needs.
