Based on the context and the answer, generate a question. 

Context: She thought I was a Japanese , as most people at the concert were Japanese . Then the 3 of us started talking about Arashi again before concert starts . Then aroud 5.30 , everyone started chanting , " Arashi ! Arashi " , waiting for Arashi to make their appearance . The opening was fantasic ! ! !

Answer:

Because the band was from Japan and the concert was in Japan .



What may be the reason most people at the concert were Japanese ?