This article is written by a Japanese local.
For foreign employees relocating to Japan, securing a Japanese mobile phone number (starting with 090/080/070) is the “starting point of all procedures” when establishing their new life. Without a reachable phone number within Japan, no procedure can begin—from signing an apartment lease and opening a bank account to contracting for utilities like electricity and water.
However, the Japanese telecommunications market is structured very strictly against initial contracts for foreigners. If HR managers instruct employees to “go to a mobile shop and get a contract” without understanding this structure, the employee will inevitably face an administrative deadlock. This article explains the objective administrative procedures required to secure initial communication infrastructure at the fastest speed.
1. The “Mobile Contract Deadlock” Faced by Foreign Employees
[Summary] Major carriers require a “Japanese bank account” or “domestic credit card,” making contracts practically impossible for foreigners immediately after entry.
When signing a communications contract at the stores of Japan’s major telecom carriers (Docomo, au, SoftBank, etc.), applicants are strictly required to present a “Japanese bank account” or a “credit card issued in Japan” to set up monthly direct debits, in addition to personal identification documents (Residence Card).
This creates a fatal contradiction: “To open a Japanese bank account, you need a Japanese phone number, but to contract that phone number, you need a Japanese bank account.” This is the classic chicken-and-egg deadlock. Credit cards issued overseas are frequently rejected by security systems, meaning that it is physically impossible for a newly arrived foreign employee to sign a contract with a major carrier.
2. “Low-Cost SIMs (MVNOs)” Contractable with a Residence Card and Overseas Credit Card
[Summary] By utilizing MVNOs with unique screening criteria, same-day activation is possible using only a Residence Card and an overseas-issued credit card.
The only rational approach to breaking this contradiction is to utilize “Low-Cost SIMs (MVNOs)” that provide services by leasing communication networks from major carriers. Specific MVNO operators specialize in services for foreigners and have established their own screening criteria distinct from the major carriers.
The criteria for selecting these operators are as follows:
- Do they accept payments with overseas-issued credit cards? Since payments can be processed via overseas Visa or Mastercard, a Japanese bank account is not required.
- Is robust multilingual support available? Select an operator that provides English or Chinese support desks to explain the terms and conditions upon contracting, and to handle any potential communication troubles.
- Are there no cancellation penalties (binding periods)? Choose a plan with no mandatory contract period. This allows the employee to use it as a “bridge” during the initial entry phase and switch to another carrier a year or two later once they have a Japanese bank account.
3. The Administrative Hurdle of “Address Registration”
[Summary] To contract a voice-call SIM, you must have completed “Address Registration” at the ward office, printed on the back of your Residence Card.
Even though Low-Cost SIMs are easier to contract, strict identity verification under Japan’s “Act for Prevention of Improper Use of Mobile Phones” cannot be evaded. When contracting a “SIM with voice call functionality” starting with 090 or 080, it is an absolute requirement that the Residence Card submitted has the “current residence (Japanese address)” printed on the back by the municipal office.
In other words, you must follow the sequence: “① Entry into Japan → ② Apartment contracting/move-in → ③ Move-in notification (address registration) at the ward office → ④ Contracting the Low-Cost SIM.” HR managers must practice strict front-loading by providing web application instructions in advance so that employees can apply for the SIM immediately after finishing their residency procedures at the ward office.
4. Practical Q&A (Troubleshooting for HR Managers)
[Summary] Answers questions directly related to HR operations, such as the difference from data-only SIMs and the pros and cons of providing corporate smartphones.
Q. It’s problematic to have no communication means at all until the address registration is complete. What should we do?
A. An effective approach is to temporarily purchase a “data-only prepaid SIM (or eSIM)” at the airport, which does not require address registration. This ensures smartphone connectivity (for app-based calls like LINE or WhatsApp). Although you cannot make cellular voice calls (090 number), navigating ward office procedures and contacting real estate agents via apps allows you to survive the blank period of a few days.
Q. Is it effective to contract a corporate smartphone under the company’s name and provide it to the foreign employee?
A. It is highly effective in terms of speeding up the procedure. With corporate registration documents and a bank account, the company can sign a contract with a major carrier on the same day, giving the employee a phone number from day one. However, this number remains “company property.” If the employee uses this corporate number as their contact info to open personal bank accounts or credit cards, serious compliance issues will arise regarding name changes and data handover upon resignation. Instruct employees to conduct private administrative procedures using a personally contracted SIM.
Conclusion: Securing Communications is the “Foundation” of All Procedures
In setting up the life of a foreign employee, the absence of a mobile phone number is not merely an inconvenience; it signifies the complete halt of all legal and administrative procedures. The primary mission demanded of HR managers is to understand Japan’s unique telecom contract rules and the bank account dilemma, and to clearly prepare a pathway to Low-Cost SIMs that can be secured with a Residence Card and an overseas credit card.