I got an iPhone 5. I kept Sony’s Xperia Android phone, but the iPhone is easier for me to use, and it offers a wider variety of accessories sold worldwide than Sony’s.
I haven’t got a Softbank nano-SIM card, so I went to the nearest DoCoMo shop to get a DoCoMo nano-SIM card for it, but they didn’t have any in stock. I visited other DoCoMo shops to ask for one, but none had it. Without a nano-SIM card, it couldn’t be activated, and it was just a small plate.

A DoCoMo shop in Tochigi-shi thankfully said they had a nano-SIM card for iPhone 5, although most DoCoMo shops in Tokyo said they didn’t have any. When I drove to the shop, there were dozens of people waiting in the queue. A shop clerk said I should wait 1.5 hours to be served, but I actually waited about 30 minutes before being served. I managed to get one, put it into my iPhone I had bought before, and had it successfully activated.