The guest purchase system on DLsite was abolished on January 9th, 2019 (Japan Time - UTC+9:00).
If you wish to request a transfer of your purchase history as a guest to your member account, please contact us with your order number. The order number is written in the purchase confirmation email which was sent at the time of the purchase.
Please note that all personal information has been already erased from our guest purchase record. If you cannot provide us the order number, we may not be able to perform the transfer.