Got stop by undercover officer at Akiba? I was at Radio Kaikan 5th floor or sixth floor just shopping with my friends. Then all of sudden I  got approach  by this old man in a business suit... he flash his badge and ask me if I was Japanese.. i said no and   he just let me go... I thought it was really weird... I then notice there was like  3-4 “business workers” pretending to buy stuff looking at me ...  I told my friends about it and we just left. 

Is this normal to be stop like this ? I’m trying to grasp what happened there  lol