I’m not sure what to call these places. I can tell you though that if they had had stores like this in the U.S. back when I was into Hanson and Backstreet Boys and the like I would have been SO into it.
I had too much pride to actually go inside any of them, lo siento. Maybe next time. If anybody really wants me to send them a mirror or calendar or mug, or towel, or nail file or tshirt or glasses case or wallet or notepad or keychain or cellphone charm or earrings or trash can with their favorite Japanese male celebrity’s face on it though I guess I would consider putting some sunglasses on and going inside.