Cancel docomo Japan (解約): Close Your Line the Official Way
Independent guide — no official affiliation with the platforms mentioned.
Short answer
You can close an NTT docomo line via My docomo under 契約内容・手続き > 解約, by calling 151, or at a docomo Shop with ID. Data-only lines close fully online; voice lines require a shop or phone. Porting out with MNP closes the line automatically with no cancellation fee. Unspent dポイント balance expires after 6 months.
Official source
nttdocomo.co.jp
NTT docomo resmî destek merkezi
01 — Step-by-step fix
Step-by-step fix
STEP 01
Sign in to My docomo
Open mydocomo.docomo.ne.jp or the My docomo app with your dAccount. Open '契約内容・手続き' (Contract & procedures).
STEP 02
Start the 解約 procedure
Tap '解約' (kaiyaku — cancellation). The system shows your docomo ID, current plan and 解約手数料 status. Data-only lines (GiGAFiLL etc.) close fully online; voice lines require a shop visit or phone call.
STEP 03
Phone alternative
Dial 151 from a docomo line (general: 0120-800-000). Say '解約したい'. The agent verifies you (birth date, 暗証番号 PIN). Decline retention offers and ask for the 受付番号 (request number).
STEP 04
Port out with MNP (recommended)
Get a 15-day MNP number via My docomo > 契約内容・手続き > MNP予約番号取得. Completing MNP at the new operator closes the docomo line automatically with no cancellation fee.
STEP 05
Final bill and fees
The procedure checks 契約解除料 (only on some legacy plans) and your dポイント balance. The final bill is issued next month; update 支払い方法 in My docomo if needed.
Tips
- MNP avoids both the cancellation fee and the shop visit — choose it whenever you want to keep the number.
- Have your 暗証番号 (4-digit PIN) ready when calling 151; no procedure runs without verification.
- Use your dポイント balance within 6 months of cancellation; check My docomo > dポイント to convert leftovers.
02 — Frequently asked questions
Frequently asked questions
Can I close a docomo line without visiting a shop?
Data-only lines: yes, fully online in My docomo. Standard voice lines need a docomo Shop visit or a call to 151. MNP (porting out) can be done fully online and avoids the shop entirely.
When is the 解約手数料 waived?
Since 2019 there is no contract-period rule; the fee (3,300円) applies only on some legacy plans if cancelled within 25 months of signing.
Does getting an MNP number cancel my line?
No — the MNP予約番号 does not close the line immediately. If you do not activate with the new operator within 15 days, the line stays at docomo.
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Links in this guide point to official platform pages. Steps may change with platform updates; check the page date.
03 — Related guides