We do not calculate on a daily basis.
Even if you join in the middle of a month, you will still be charged the monthly membership fee for that month.
*If using Softbank lump sum payment
The billing cycle is one month from the date of enrollment (the day before the same day of the following month), and you will be charged according to the number of months of use.
Please also see the help below.
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Q.What are the membership fees and payment methods?