Osaka hobby shops 2 first train store

Osaka train shop crawl part 2.
Now, to the main train store on the (vast) 5th floor of the (immense) Yodobashi. The store is only one area within an open mega store space. I'm learning that this is a frequent thing: no storefront, just a footprint in a seriously trafficked place. And for the Japanese, it's the same thing I think as "brick and mortar."