Q: Why cannot I log-in even though I have my own pass-word?
A: Please manage your cookies.
Please check the following procedures.
For Windows users... http://windows.microsoft.com/en-us/internet-explorer/delete-manage-cookies#ie=ie-10
For Chrome users... https://support.google.com/chrome/answer/95647?hl=en

Q2: Can I cancel my registration after payment?
A2: You CAN cancel after payment.
   We will refund the fee according to the cancelation fee on the TOP page.

The refund will be made on-line or bank transfer. (The same method as you payed.)