I walked past Minami-ya the first time I was looking for it. It's dark and a bit easy to miss. The grandpa behind the counter smiled when I asked if the shop has been around a while. 1933. They're quickly tearing down the waterfront to build chic mega-towers, and slowly building new islands in Tokyo Bay for even more. Thank you みなみ屋 for the extra currypan service. And thanks @gene.krell and Nao for the recommendation.