Points expire 6 months after your last activity.
If you earn points by placing a new order, etc, the expiration date of your points will be extended by 6 months.
After expiration, all accumulated points will become invalid.
You can check the expiration date on My Page.
Last activity refers to (1) orders that result in the earning of points (2) the acquisition of certain rewards (excluding birthday bonuses).
Orders that result in the earning of points refers to order totals that resulted in a payment of 1 yen or more. If no points are awarded due to payment of the entire order total with points, the order does not constitute an "order that results in the earning of points", and the point validity period will not be extended.