I've been working on some "big things" relating to my card shops in Japan posts. Part of that includes revisiting the shops, taking new photos, and rewriting the posts now that I have better knowledge of the overall card market in Japan. While some stores have renovated or rearranged their stores, and I just discovered one might have closed down, only one has actually moved in the past two-plus years.
The Akihabara branch of the Mint card shop franchise is a small part of one of the Yellow Submarine shops. Yellow Submarine can be found all over Japan, but most of their stores sell gaming cards or goods relating to other hobbies (model building, figurines, etc).
The store was located in a building on the corner of the main street running through Akihabara's Electric Town district, the main tourist area in Akihabara. This home was temporary though, as they tore down and rebuilt the Akihabara Radio Kaikan building two doors down. The new building opened just a couple weeks ago, and there literally was a line around the block waiting to get in. I visited a week later, on Monday, and had no such problem. I'll have a full post about the new building on my other blog eventually (hopefully soon).
Yellow Submarine takes over the entire sixth floor of this new building, with the gaming cards located to the right as you come off the escalator (going up). Walk past these display cases and you'll eventually see some NPB cards in similar cases on the right.
The NPB section seemed smaller here than at the old location at first, but then I remembered that most of the card section was full of idol cards. The space is a bit larger overall.
As I mentioned, Calbee singles can be found here too. In addition to cards from the past year, they have a very small selection of 1970s-1980s cards and some singles (including inserts) from around 1998-2002. Other years and other manufacturers are hit and miss, and the selection can quickly change as they clear out space for new sets from time to time, or add cards from a recent purchase.
You can't miss the Radio Kaikan building. From JR Akihabara Station (not the Hibiya subway line or Tsukuba Express stations) take the Electric Town exit, go to the left after passing through the gates, and turn right. It'll be just across the street; you should see the same view as my first picture above, possibly with some differences in advertising. The store is open daily 11:00-20:00.