Opening a Bank Account & Getting a Phone Plan in Japan: The Paperwork Nobody Explains

The two errands that quietly determine how smooth your first month in Japan actually goes.

Almost everything else — signing a lease, getting paid, ordering things online — assumes you already have a bank account and a phone number. Here's the order that actually works, and the paperwork nobody hands you a checklist for.

🏦 Opening a Bank Account

You'll generally need:

• Residence card (在留カード, zairyū kādo) — issued on arrival if you're staying more than 90 days; this is the core requirement most banks won't skip
• Proof of address — usually your residence card updated with your current address after registering at your local ward office
• A hanko (印鑑) or signature — many banks still use a personal stamp (hanko) instead of a signature, though an increasing number now accept a signature for foreign residents; ask before assuming you need one
• A Japanese phone number — some banks want this at account opening, which creates a chicken-and-egg problem with the phone section below

Banks known for being foreigner-friendly: Japan Post Bank (ゆうちょ銀行, yūcho ginkō) is widely recommended for a first account — it has the most locations nationwide and relatively straightforward requirements. Online-first banks like Sony Bank or SBI Shinsei also tend to have more English-language support than traditional megabanks.

📱 Getting a Phone Plan

You've got two broad paths:

If you're newly arrived and don't have a bank account yet, a prepaid SIM or eSIM is a practical bridge — it lets you get a working number while you handle the bank account step, rather than getting stuck in the chicken-and-egg loop of needing a phone number for the bank and a bank account for the phone contract.

📋 A Practical Order of Operations

1. Register your address at the local ward office (required first, feeds into everything else)
2. Get a prepaid SIM or eSIM if you need a number immediately
3. Open a bank account (Japan Post Bank is a common, accessible first choice)
4. Switch to a full carrier or MVNO plan once you have the bank account to support it, if you want a cheaper long-term plan

For official government guidance on opening a bank account, the Financial Services Agency publishes a dedicated English-language resource.

⚠️ 7 Mistakes to Avoid

1. Trying to open a bank account before your residence card is updated with your address — many banks require this first.
2. Assuming every bank requires a hanko — increasingly, many accept a signature; ask rather than assuming you need to buy one.
3. Getting stuck in the phone-number/bank-account loop — a prepaid SIM or eSIM can break the deadlock.
4. Signing a major carrier contract without comparing MVNO pricing — the difference in monthly cost is often significant.
5. Not asking about English-language support before committing to a bank — it varies a lot by branch and bank.
6. Assuming online banks don't need in-person steps — some still require an in-person visit or mailed documents to finish setup.
7. Not checking for a contract period (shibari) — some budget plans lock you in; ask directly if you want flexibility.

📋 Your Cheat-Sheet Recap

Get the address registration, a working number, and a bank account sorted in that rough order, and the rest of settling in — a lease, a job, a gym membership — stops being blocked on paperwork you didn't know you needed.