We would like to express our sincere gratitude for your continued patronage.
Currently, when payment is completed by credit card, there is a phenomenon that payment completion emails are sent multiple times to the customer's email address.
We are currently trying to find the cause and improve it.
※ postscript
Regarding the phenomenon in the title, it was confirmed that it was caused by the system settings.
At 2021:2 on February 8, 14, we changed and corrected the system settings.
We apologize for the inconvenience this time.