Best eSIM for Japan 2026: Mobal vs Sakura Mobile Compared

An eSIM is the simplest way to get connected in Japan — install it before you fly, activate the moment you land, no airport counter required. Of the providers we’ve independently verified, Mobal and Sakura Mobile are the two worth comparing directly for eSIM specifically.

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Mobal: exact-day pricing and a real phone number

Mobal’s 5G Unlimited tourist eSIM is priced per exact day (3-31 days) rather than in fixed multi-day bundles, and it’s one of the only tourist eSIMs that also offers a genuine voice line with a real Japanese phone number. Billing is in JPY, so there’s no FX conversion guesswork.

Sakura Mobile: tiered sizes and format flexibility

Sakura Mobile’s eSIM plans come in fixed data tiers rather than unlimited-only, which suits travelers who’d rather pay for exactly the data they’ll use. It’s also the only one of the two that lets you switch to a physical SIM or pocket WiFi from the same provider if your needs change mid-trip.

Is eSIM right for you?

You’ll need an eSIM-compatible phone (iPhone XS/XR or newer, most Android flagships from the last several years) that’s unlocked. See our eSIM for iPhone guide for device-specific setup details, or the full eSIM vs Physical SIM comparison if you’re still deciding on a format.

Size your data plan correctly:

• See our full data usage guide
• Watch out for hotspot caps on “unlimited” plans: unlimited data explained

Plan your specific trip:

• ✓ Solo travelers: Tokyo 7-day solo guide
• ✓ Business travelers: Tokyo business trip guide
• ✓ Multi-city backpacking: 14-day backpacker guide

Comparing all three providers and every format? See the full Best SIM Card for Japan overview.

Frequently Asked Questions

What's the best eSIM for a short trip to Japan?+

Mobal's exact-day pricing avoids paying for days you won't use on a short trip, while Sakura Mobile's fixed 4- and 7-day tiers are a close match for common trip lengths too.

Do I need to buy data by the GB or is unlimited always better?+

Unlimited is convenient if you don't want to think about it, but a correctly sized tiered plan (like Sakura Mobile's) is often cheaper for light users. See our data usage guide to figure out which you are.

Can I install a Japan eSIM before I leave home?+

Yes — this is one of eSIM's main advantages. Install the profile in advance and activate it once you land, with no need for airport WiFi to download anything.

Does either provider offer a real phone number on eSIM?+

Mobal does — it's one of the few tourist eSIM providers offering a genuine voice line with a Japanese phone number, not just data.