I took a picture of a performer at a concert and was told to delete the picture and was asked to leave midway through the concert. I want my ticket money back.

For concerts held in Japan, it is common for photography to be prohibited in many venues. In addition, most venues will have a bulletin board or other announcements to that effect. Prohibited items may also be listed on the face of the ticket purchased or on the reservation screen if the ticket was purchased via the Internet. In this case, filming is a violation of the contract with the organizer. If prohibited activity is discovered, you may be asked to delete the data you have taken, or you may be ordered to leave the venue in the middle of the event. It may be difficult to ask for a refund. In general, the organizer will decide whether or not to allow filming based on the artist's wishes and the conditions of the venue. In the case of Japanese artists, it seems that photography is currently prohibited in most cases, but it is sometimes permitted with some foreign artists. Please check in advance to avoid any unpleasant experiences on the day of the event.