The room with the slanted photos hanging over the window is the main floor of the dojo. You can usually see it in any YouTube video featuring a top-level Seido player. It's a pretty small world. That footage was way before my time but I'm unsurprised it hasn't changed a bit.
I'd love to do a dojo review of the place and recommend it for anybody who goes to Osaka but I'm not going to because the last review I wrote ended badly for me.