They look at the their recent activity and how many pictures and videos they posted.
The land of Fuyuki City, which possessed the second greatest spiritual power in all Japan, was owned by Rin's ancestor, ; at the behest of the Einzberns, he provided his property as battleground for present and future wars.
Ten years ago, was selected as a Master in the 4th Holy Grail War, and Rin was entrusted to take care of the Tohsaka estate until his return.