This page explains to what to do if you want to cancel your participation in an event after you have registered for it.
Once you've ordered a ticket, the person who ordered the ticket cannot cancel it directly. Also, whether you can cancel or not varies depending on the event organizer. Please contact the event organizer directly about ticket cancellation.
If the above does not solve your problem, please contact us via the inquiry form.
(Our business hours are from 10:00am to 6:00pm Japan time on weekdays. For inquiries made on weekends and holidays, our response may be on the next business day.)