Incredibly Ingenious: Japanese Inventions You Can't Find Elsewhere

3. Cave Trading

What It Is: A trading card store with four floors located beneath a bridge Average Cost: Nothing to Enter* The entrance to this four-floor trading card store is deceptively modest, as it is located beneath a bridge. But as soon as you walk in, the level after the floor of glass cabinets will leave you dumbfounded. There are thousands, if not millions, of trading cards stored in these cabinets.

The Cave Trading @inspiredbymaps/Pinterest These cards contain both uncommon and commercial editions, and they are drawn from games such as Magic, Yu-Gi-Oh!, and Pokemon. The shop is situated in Tokyo's Akihabara District, which is well-known for being a major shopping area. It has stores selling electronics, video game, manga, and anime shops, interesting maid cafes, and more.