Mobal vs Sakura Mobile: Which Is Better for Expats in Japan?

Both providers are built around a problem many newcomers face: you need mobile service in Japan, but you may not yet be comfortable signing a Japanese-only carrier contract. Their long-term Voice+Data products can provide a standard Japanese mobile number, so they are more useful for resident life than a travel eSIM that only supplies data.

The biggest practical split is price structure. Mobal starts much lower because it offers a 1GB plan at ¥1,650 per calendar month, while Sakura Mobile's Voice+Data lineup starts at 5GB for ¥3,278 including tax. At the same 5GB and 15GB points, Mobal is slightly cheaper. At 30GB, both currently list ¥4,378 including tax.

That does not make Mobal the automatic winner. Sakura Mobile extends its Voice+Data lineup to 40GB, 60GB, 80GB and 100GB, while Mobal's standard activation page lists monthly choices from 1GB through 50GB. If you routinely tether a laptop, stream heavily or do not have home internet yet, Sakura's broader high-data menu can be more convenient.

• Best starting price: Mobal.
• Best high-data menu above 30GB: Sakura Mobile.
• Both: physical SIM and eSIM options for long-term users.
• Both: month-to-month style service rather than a long fixed-term lock-in.

If you are moving to Japan rather than visiting for a week, the phone number is often more important than raw data. A real Japanese mobile number can be requested by landlords, delivery companies, employers, clinics, banks and online services. It is also useful for receiving SMS verification codes. For that purpose, compare the Voice+Data products, not the cheaper travel-data products.

Mobal states that its Japanese Voice plans provide a real 070, 080 or 090 number. Sakura Mobile's Voice+Data SIM/eSIM also provides a Japanese phone number with voice and SMS. In practical terms, both are designed for the resident use case where you need to receive ordinary calls and texts, not just use messaging apps.

One difference is how you should think about ongoing cost. If you mainly need the number for incoming calls, authentication and occasional local calls, Mobal's low starting plan is compelling. If the phone will also be your main internet connection, Sakura's larger data tiers may matter more than a small difference in per-minute calling cost.

• Choose a Voice+Data plan if you need a normal Japanese phone number.
• Do not assume a travel eSIM includes voice calling or SMS.
• Keep enough data or Wi-Fi access for app-based calls if you want to minimize carrier call charges.

Both companies now support eSIM as well as physical SIM for long-term service, but your phone is the first gate. Before ordering, confirm that the device is unlocked and that the exact model supports the network bands and eSIM functions required in Japan. A phone can support eSIM in one market and still have different hardware or carrier restrictions in another.

Mobal says its physical Japan SIM requires an unlocked phone and support for the relevant Japanese network band, and Android voice calling also depends on VoLTE compatibility. Its eSIM is the better route for eSIM-only phones. Sakura Mobile similarly provides physical SIM and eSIM monthly products and publishes separate installation guidance for supported Apple and Android devices.

eSIM is convenient because there is no card to lose or wait to insert, but installation has its own failure points. Sakura Mobile warns that its monthly eSIM can only be installed once on the registered device and should not be deleted after successful installation. That makes a careful first setup more important than with a physical SIM. Physical SIM is usually easier to move between compatible devices, but you must have a working SIM tray and the correct physical slot.

• Check that your phone is unlocked before paying.
• Confirm eSIM compatibility using the exact model number, not just the phone family name.
• Keep a stable internet connection while installing an eSIM.
• Do not delete an installed eSIM until you understand the provider's reissue procedure.

Voice service in Japan involves identity verification, so neither provider should be treated like an anonymous data-only travel SIM. Mobal states that voice users must complete identity checks and may need to present a valid passport. Sakura Mobile also requires identity and address documentation for monthly Voice+Data contracts; the exact acceptable combination depends on your status and how you receive the service.

Mobal accepts debit or credit card and PayPal for its Japan SIM service, which is useful if you have not opened a Japanese bank account yet. Sakura Mobile's ordering flow is also designed for foreign residents and students, but you should check the payment options shown for the plan you select before committing.

Both providers avoid the classic multi-year carrier lock-in. Mobal advertises no contract and cancellation at any time. Sakura Mobile describes its Voice+Data service as month-to-month with no lock-in and allows cancellation through its online account process. Sakura also offers a suspension option for eligible Voice+Data users, reducing the monthly fee while the line is inactive; that can be useful if you regularly leave Japan but want to keep the same number.

Physical delivery and pickup can matter during your first week in Japan. If you need the number immediately for apartment, bank or work procedures, check whether your chosen product can be activated in time, and do not assume physical SIM delivery and eSIM activation follow the same schedule.

• Prepare identity documents before ordering a Voice+Data line.
• Mobal can be paid with debit/credit card or PayPal.
• Both providers offer flexible cancellation rather than a long fixed-term contract.
• Sakura Mobile's eligible Voice+Data users can suspend service instead of terminating the number.

Choose Mobal if your priority is getting a real Japanese number at the lowest practical monthly cost, especially if 1GB to 15GB is enough and you expect most calls to happen through apps. It is also a strong fit when you have just arrived, do not yet have a Japanese bank account and want a straightforward payment route with an international card or PayPal.

Choose Sakura Mobile if you expect to use 40GB or more, want a broader high-data ladder, or value its resident-oriented account management and suspension option. It is also appealing if you want detailed English setup material around eSIM and long-term service.

If you sit in the middle at 30GB, monthly price does not separate the two because both list the same tax-inclusive fee at that tier. Then make the decision on device compatibility, upfront cost, call usage, support preferences and how easily you can complete identity verification. That is a better decision rule than choosing whichever brand appears first in a search result.

• Mobal: low-data, low monthly cost, simple foreign-card/PayPal payment.
• Sakura Mobile: heavier data use, wider high-data choice, suspension option.
• At 30GB: compare setup and service details because the listed monthly fee is the same.