Here is some random bar I stopped at. I was given peas and a spoon along with my beer, and I am pretty sure that they over-charged me.
This is a pachinko parlor. It is a huge rip-off.

You put in about 8 dollars into the machine and then you are given so many metal balls. You then control how quickly these metal balls are fed into the machine.

I couldn't stop playing soon enough. The circular knob on the lower right-hand side controlled the flow, and a series of pink buttons controls the slot-machine game and the cash-out function. No one spoke English so this I learned through the pantomimes of the frustrated pachinko attendants as I kept repeating "I do not understand." I cashed out as soon as possible. That process was pretty strange, first the balls were counted and I was given a receipt. Then, I took that receipt to the back where an old man gave me two pieces of candy and a couple small plastic slides with yen inside. I was then led outside to an adjacent building where a chubby woman's hand behind a small window gave me 400 yen for those slides. (I gather that this is all an elaborate scheme to circumvent the laws against gambling in Japan.) All in all, I ended up losing 600 of the 1000 yen I paid into the machine. So, basically I paid about 5 bucks for two small pieces of candy and a lesson in avoiding pachinko parlors.