マイレージ do not become available for use until 1日 days after your order is delivered to you.
Please note that マイレージ remain pending in case the order is cancelled or returned. Pending マイレージ cannot be used as a payment menthod.
Once the マイレージ become available (=Total マイレージ earned - マイレージ used - マイレージ pending), you can use them like cash to pay for any purchases.
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