I'm always weirded out. I just watched a Japanese H video where the women are in vending machines. The guy puts in ¥100 and gets a women who he then proceeds to have intercourse with while, eating a bento on her back, talking on the cellphone and then reads the newspaper. He then finishes up and puts her in the women recycling bin next to the women vending machine.
PM me for link. It is great.
Edit: But back to the topic at hand, yes, Japan prices are strange, but ¥100 for a women from a vending machine is a great deal.