DOCOMO bills for basic monthly charges, dialing charges, and communications charges the month following the month of use. Payment is due by the last day of the month the bill is issued (or next business day if the last day of the month falls on a weekend or holiday).
For example, billing for March usage is...

Bills are sent from around the 10th to 16th of each month.
If subscription is started or canceled in the middle of the month, charges will be calculated on a pro-rata basis for days used.
If charges are exceptionally high compared to your normal usage, we may notify you of this before billing for charges.
You may be billed early depending on usage conditions.
Confirming / Managing Your Usage
Check usage charges and make various applications online.
Online Procedures / References
Managing day-to-day usage
You can check your dialing and communications charges up to the previous day.
DOCOMO Charges Information Service
This service lets you know via e-mail when the total of your communications charges etc. from the first of the month to the previous day exceeds the amount you set.
Search and view your i-mode usage (access history) on your PC via the Internet.
Notification of monthly bill details
You will receive monthly bills and other notices via i-mode, mopera, the Internet website, or e-mail in lieu of the notification of automatic payment or information on charges by post.
The Itemized Billing Service provides details including "when" (date and time), "where" (who you made the call too), and "how long" (duration of calls and communications) for individual calls and communications.
Payment Methods
We recommend that you pay by automatic payment or credit card.
Paying by Automatic PaymentThe billed amount will be transferred from a designated bank account on the due date. |
Paying by Credit CardYour credit card company will bill you for DOCOMO charges monthly. |

