2026 Guide
How to Cancel Your SIM in Japan (Before You Leave)
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If you only read this part
Cancel before you leave Japan — not after. Most online plans (LINEMO, povo, ahamo, Rakuten Mobile) have no cancellation fee and no minimum term, but cancelling from overseas after your residence card expires is dramatically harder.
The basic sequence: settle any device installments, complete an MNP transfer if you're switching carriers (not leaving Japan), cancel through the app or website, confirm the final bill, and destroy the SIM. Allow a week of buffer before your departure flight.
Section 01
Why timing matters so much.
The single most expensive mistake foreigners make with Japanese mobile plans is leaving the country without cancelling. The carrier doesn't know you've gone — they keep billing the Japanese credit card or bank account you registered, sometimes for months, until the payment fails or the residence card on file expires. By then you have unpaid charges, a marked credit record with Japanese banks, and the friction of trying to resolve it from another country.
Cancelling while you're still in Japan, with a working Japanese phone number and an active residence card, takes 10 to 30 minutes through the carrier's app. Cancelling from overseas, after your card has expired and your phone number is unreachable, takes hours and often requires a Japanese-speaking friend or a paid service.
Do it before you fly. That's the rule. Everything else in this guide is detail.
Section 02
Before you cancel: a checklist.
- Settle any device installmentsIf you bought a phone on a 24- or 48-month payment plan through your carrier, cancelling the line doesn't automatically forgive the remaining balance. Either pay it off in full, or confirm with the carrier that installments will continue after cancellation — and that the payment method stays valid.
- Save anything tied to your Japanese phone numberTwo-factor authentication codes for Japanese banks, your MyNumber portal login, government services, delivery notifications. Switch each to an email-based or app-based authentication method before the number is released.
- Decide: cancel or MNP?If you're switching to another Japanese carrier and want to keep your number, you don't cancel directly — you start the new carrier's MNP process. See our MNP guide. If you're leaving Japan entirely, straightforward cancellation is the right path.
- Plan a buffer weekCarriers process cancellations within 1–7 business days. Don't try to cancel the morning of your flight. Aim to start the process at least a week before departure.
- Confirm your billing addressThe final invoice may be issued after cancellation. Make sure the carrier has a contact method that still works — your email address, ideally not tied only to the cancelled number.
Section 03
Cancelling each major carrier.
LINEMO (SoftBank online brand)
Log in to My Menu through the LINEMO website or app. Navigate to the cancellation section (解約手続き). Confirm the cancellation date, settle any pending charges, and submit. No cancellation fee, no return of the SIM card required. You can complete the entire process online in English-friendly menus. The cancellation typically takes effect the same day or next business day.
povo 2.0 (au online brand)
Cancellation is in the povo2.0 app, which is Japanese-only. Tap the menu, select 各種手続き (various procedures), then 解約 (cancel). You can also let your line cancel automatically by not buying any data toppings for 180 days — this is the only major plan where a soft expiry exists. If you're leaving Japan within six months, even letting it lapse passively works, though formal cancellation is cleaner.
ahamo (docomo online brand)
Log in to the ahamo website with your dAccount. Navigate to 解約 (cancellation). The interface is Japanese-only, so use browser translation or have help reading it. No cancellation fee, but if you have a device installment plan from docomo, that remains outstanding after the line cancels.
Rakuten Mobile
Log in to my Rakuten Mobile through the website or app. Go to the contract management section and select 解約 (cancellation). Rakuten supports English customer support if you'd rather call. No cancellation fee. Worth noting: if you've accumulated Rakuten Points tied to your Rakuten Mobile usage, cancelling the line doesn't automatically forfeit them — they stay in your Rakuten member account.
Mobal
Email Mobal's English support to cancel — there's no self-service cancellation flow as of 2026. Specify your account and the date you want service to end. They'll confirm the final charges and effective date. The whole process can be done in English by email within a day or two.
Sakura Mobile
Email or use the contact form on Sakura Mobile's website. English support handles the cancellation process. Confirm the final billing cycle, any device returns, and the effective end date. As with Mobal, this is the friendliest cancellation experience for non-Japanese speakers.
docomo, au, SoftBank (traditional plans)
If you're on a traditional contract from one of the big three (not their online sub-brands), cancellation may require a phone call or store visit. The carriers are obliged to support English by request, but expect Japanese-default and ask for an English-speaking agent. Visit the store with your residence card and the original SIM card. Some legacy plans still have early-termination fees if you're inside a 24-month commitment window.
Section 04
What happens after you cancel.
Once cancellation is processed, several things happen in sequence over the following days and weeks:
Service stops
Your line is deactivated, usually the same day or the following business day. Outbound calls and data stop working. Incoming SMS may briefly continue to be received but won't be deliverable.
Your phone number is released
After a holding period (usually 30–90 days), the number returns to the carrier's pool and may be reassigned to a new customer. If you receive a final SMS or call, you have a short window before that happens.
The final bill is issued
The final charge is calculated, usually pro-rated to the cancellation date, and billed to your registered payment method. This usually arrives 7–30 days after cancellation. Watch for it — if the payment fails because you've already closed your Japanese bank account, the carrier will follow up.
Device installments continue (if applicable)
If you bought a phone on installments, those continue after the line cancels. Make sure the payment method linked to the installment plan stays active until it's paid off, or pay it off in a lump sum during cancellation.
Account closure
For most online brands, the account closes once cancellation is processed. For carriers with broader services (like Rakuten with its ecosystem of services), the mobile line is cancelled but your account profile remains for other Rakuten products.
Section 05
Special situations.
Cancelling from overseas after you've left
If you've already left Japan without cancelling, here's the realistic path. First, log in to the carrier's website using your account — most online brands work from anywhere. If you can complete cancellation through the website, do that. If verification requires SMS to your old Japanese number and that number's still active, use it before it lapses. If the account has been frozen because of failed payment, you'll need to contact support — most carriers have an overseas support contact, though hold times can be long. For Mobal and Sakura Mobile, English email support handles overseas cancellation cleanly. For domestic brands, having a Japanese friend or paid representation service helps.
Cancelling because your residence card expired
This is the case where people get stuck. If your residence status has lapsed, the carrier may flag the account but still bill until formal cancellation. Contact the carrier proactively — explaining you're leaving Japan and providing your departure date generally satisfies their identity check, even with an expired card. The earlier you start this conversation, the smoother it goes.
Returning to Japan within a year — should you keep the number?
If you're leaving but plan to return in under 12 months, weigh whether keeping the number is worth the monthly fee. The cheapest options to "hold" a number while overseas are povo's ¥0 base (with the 180-day topping requirement) or a minimal Mobal plan. For longer absences, just cancel — the value of a Japanese phone number disappears once you're not in Japan to receive its calls and SMS.
If you bought a phone on installments
The phone purchase is a separate contract from the SIM plan. Cancelling the SIM doesn't cancel the device installment. Either pay the remaining balance in full when you cancel (carriers usually offer this), or confirm that installments will continue on a still-valid Japanese payment method. Don't leave Japan with an active installment paid through a bank account you're about to close.
Section 06
Common cancellation mistakes.
- Leaving Japan without cancelling at allThe worst mistake. Charges accrue on your registered payment method, and resolving it from overseas is painful. Always cancel before you fly.
- Cancelling the SIM but not the device installmentYour phone payment plan keeps running. If the payment method later fails, you're flagged with the credit bureau for non-payment, which damages future Japanese financial applications.
- Closing the Japanese bank account before the final billThe final invoice may arrive 2–4 weeks after cancellation. Keep the Japanese bank account open until you've confirmed the last charge has gone through.
- Trying to cancel the day before flyingCancellation processing can take several business days. Leave a week of buffer. If anything goes wrong (failed authentication, account flag, missing document), you have time to fix it.
- Forgetting two-factor authentication tied to the numberBanks, government services, and some apps use your Japanese number for SMS verification. Switch each one to an alternative method (email, authenticator app) before the number is released.
- Assuming the carrier knows you've leftThey don't. The carrier sees a registered customer in good standing until something proactively tells them otherwise. That something is your cancellation request.
Section 07
The minimum-friction sequence.
If you want one clean recipe to follow, here it is. Two weeks before your departure flight:
Day 14 before flight
List every service tied to your Japanese phone number (banks, apps, government). Start switching their authentication method.
Day 10 before flight
If you have a device installment, pay it off in full or confirm continuation. Log in to your carrier account, find the cancellation page, and read the terms — don't cancel yet.
Day 7 before flight
Submit the cancellation request. Choose an effective date 2–5 days out so the line stays active for any final SMS verification you might need.
Day 2–3 before flight
Confirm cancellation went through. Destroy the SIM card or set it aside. Check that you've cleared all carrier-related logins from your phone.
After you arrive home
Keep monitoring your Japanese bank account for the final invoice. Once it processes successfully, you can close the bank account if you're not returning to Japan.
For a clean handoff when you might return to Japan, an MNP transfer to a low-maintenance number-holding plan beats full cancellation. See our MNP guide. If you're still using a Japanese carrier and considering switching to save money before you leave, our cheapest mobile plans guide covers the budget tier.
FAQ
Frequently asked questions
Is there a cancellation fee for Japanese SIM plans?
For most online brands launched after 2020 — LINEMO, povo, ahamo, Rakuten Mobile, Mobal — there is no cancellation fee and no minimum contract period. Older MVNOs and traditional carrier plans may still have minimum-term clauses and modest cancellation charges. Always check your specific plan's terms before cancelling.
Can I cancel my Japanese SIM after I leave Japan?
It's much harder. Cancelling from overseas typically requires sending a written request by post, calling Japanese-only support, or using an account login that may not work without a Japanese phone number for verification. Always cancel before you leave Japan whenever possible — it saves hours of friction later.
Will I get charged after I leave Japan if I don't cancel?
Yes, usually. Japanese carriers continue billing the registered Japanese credit card or bank account until the line is formally cancelled. If your residence card expires and the account closes for non-payment, your credit history with Japanese banks can be damaged — a problem if you return to Japan later.
Do I need to return my SIM card?
Most online brands no longer require returning the physical SIM — you can simply destroy it. A few carriers still ask for return, especially traditional docomo, au, or SoftBank plans. Check the cancellation page; if return is required, you'll be told where to mail it.
What happens to my phone number when I cancel?
Once cancelled, your Japanese phone number is released and reassigned. If you might return to Japan, consider doing an MNP transfer to a low-cost number-holding service before leaving rather than fully cancelling. If you're never coming back, just cancel — there's no value in keeping the number.
Can I cancel through the app or do I need to call?
Most online brands (LINEMO, povo, ahamo, Rakuten Mobile) let you cancel entirely through the app or website — no phone call required. Traditional carriers and some MVNOs still require a phone call or a store visit. Foreigner-focused providers like Mobal and Sakura Mobile have English email cancellation, which is the easiest route if your Japanese isn't fluent.