I picked up a running shirt in Shinjuku that says Fujisan in kanji, and it has a red circle and a picture of Mt. Fuji. A lot of people on the street stare and laugh/smile when they read it, and even a few workers at clothing stores have commented "fujisan!" when they notice it. I've been to Kyoto and Osaka since then and people have laughed and smiled there too.
Can someone explain what is going on? I'm guessing that they're laughing at a foreigner wearing a shirt similar to "I Love NY", but I'm really surprised at the attention this is getting so I'm convinced that there has to be more to it.
EDIT – Here is fujisan in all of its glory: https://imgur.com/a/fujisan-FUfZqao
by mylhowse