How to Get a Japanese Phone Number in Tokyo: SIM and Mobile Plan Guide (2026)

A Japanese phone number is one of the first things you need after arriving in Tokyo. Banks, landlords, delivery services and many apps ask for one, and without it even simple tasks can stall. The good news is that getting connected is straightforward once you understand the options and the paperwork. This guide explains the types of mobile plans available, what documents you need, how identity checks work, how to pay, and practical tips for your first weeks.

Why You Need a Japanese Number Early

• Bank accounts: Most banks ask for a Japanese phone number when you open an account.
• Renting an apartment: Landlords, guarantor companies and management companies need to be able to contact you.
• Everyday services: Deliveries, clinics, ride and food apps and many online services use SMS verification.

Because the phone number and bank account often depend on each other, it helps to plan the order of your setup (see our guide to opening a bank account).

Types of Mobile Plans

• Major carriers: Full-service contracts with stores nationwide and in-person support. They usually offer the widest range of plans and handsets.
• Carrier sub-brands and online plans: Lower-cost plans that run on major networks, often applied for online.
• MVNOs (budget SIM providers): Low-cost data and voice plans that rent capacity on major networks. Speeds can be slower at busy times.
• Prepaid and data-only SIMs: Useful for your first days, or if you do not yet have a residence card. Many do not include a regular voice number.

What Documents You Need

Under Japan's Mobile Phone Improper Use Prevention Act, mobile carriers must verify the identity of anyone signing a contract and keep records. According to the Telecommunications Carriers Association (TCA), accepted ID includes the residence card (在留カード), along with documents such as a passport, driver's license or My Number card.

• Residence card: The key document for most foreign residents. Your current address must be registered on it.
• Proof of address: If your card does not show your current address, you may be asked for additional documents.
• Payment method: A credit card or a Japanese bank account for monthly bills.

How the Identity Check Works

• In store: Staff check your original ID in person.
• Online: Many providers use electronic identity verification (eKYC), which may involve taking photos of your ID and yourself or reading the IC chip in your card with your smartphone.
• Rules are tightening: Japan has been reviewing identity check methods to reduce fraud, so the accepted online methods can change. Check the provider's current requirements before you apply.

Paying for Your Plan

• Credit card: The most widely accepted method. Some providers only accept Japanese-issued cards.
• Bank account debit: Available with many carriers once you have a Japanese account.
• If you have neither yet: Start with a prepaid or data SIM, then switch to a monthly plan once your bank account or card is ready.

Keeping Your Number When You Switch

Japan supports mobile number portability (MNP), so you can move to another provider without changing your number. This makes it easy to start with a convenient plan and move to a cheaper one later. Also check whether your phone is SIM-unlocked and supports eSIM if you plan to use your own device.

Choosing a Plan: Questions to Ask

• How much data do I really use? If you have Wi-Fi at home and work, a smaller data plan may be enough.
• Do I need a voice number? Many banks and services require a number that can receive calls or SMS, so a data-only SIM may not be enough long term.
• How important is in-person support? Store-based carriers cost more but can help if you are not yet comfortable in Japanese.
• Will I travel abroad often? Check international roaming options and costs before choosing.
• What happens if I leave Japan? Check cancellation rules and any remaining device payments before signing.

Common Problems and How to Solve Them

• "Your address doesn't match": The address on your residence card must match your application exactly. Update your card at the ward office first if you have moved.
• Foreign credit card declined: Try another provider, use bank account debit once your account is open, or start with prepaid service.
• Short period of stay remaining: Some providers may limit contracts if your residence card expires soon. Apply after your visa renewal if timing is tight.
• Online verification fails: Photos may be blurry, or your card's IC chip may not be readable by your phone. Visiting a store is often the quickest fix.

Practical Tips for Newcomers

• Register your address first: Complete your residence registration at the ward office so your residence card shows your address.
• Bring everything at once: Residence card, passport and payment card, to avoid repeat visits.
• Ask about English support: Some stores and online services offer English assistance; availability varies.
• Read the contract term: Check for minimum contract periods, cancellation fees and device installment plans.
• Keep your number when you move within Japan: Update your address with the provider after moving.

How Access Japan Real Estate Can Help

Access Japan Real Estate is a licensed real estate broker in Minato-ku, Tokyo, helping newcomers in English and Japanese. When we help you find a home, we also help you plan the order of address registration, phone and bank setup, so your move-in goes smoothly.

Final Thoughts

Getting a Japanese phone number is quick once you have your residence card and a way to pay. Start with the option that fits your first weeks, then switch to a cheaper plan later using number portability. Before you sign, compare the monthly price, the minimum contract period, the support you will need and how you will pay. A little planning at the start can save both money and time over your first year in Japan. Contact us if you need help settling into your new home in Tokyo.

This article is general information. Plans, prices and identity verification rules change; please check each provider's current requirements.

Cover photo: Rodion Kutsaiev / Unsplash