According to my wife, G.U. is the only place to buy decent quality clothes at a reasonable price in Japan. Last Saturday, we paid a visit to the G.U. store in Kawasaki. That's the one in the Dice building.
I hate shopping especially for clothes, so I took the kid for a walk around different floors in the Dice building. Once my wife had finished shopping, she called me back and asked me to pay for the clothes.
When I went to the area where the counters usually were, I could find any counters. Instead, there were few machines like ATMs scattered around that area. I watched from a distance and it seemed that you had to use them to make the payments. Luckily there was one person who was explaining to others how to operate the machines so I got in line with the queue.
What you have to do first of all is to open a little door in the bottom of the machine and put the clothes in it. Then you will be shown a screen to select (using your finger) if you are member of G.U store. This is due to the fact that they offer discounted prices on some items if you are a member. Since anyone can just say that he is a member, I suppose there is always someone there to confirm it. What you have to do to prove you are a member is just to open the G.U app on your mobile phone and browse to the Member's Page.