Sometimes Japan seems like the most wasteful place on the planet. Sure, we American's get blamed all the time for using to many resources but living here in Japan it's hard to believe Japan is not #1 in waste.
The biggest problem is wrapping/packaging. As an example you can actually get individually wrapped candy covered chocolates here. Think M&Ms each individually wrapped. If I go to get some pastries they will put each individual pastry in a separate plastic bag, put all those bags in a paper lunch bag and then but the paper lunch back in a plastic grocery bag. Would you like some pastry with your bag?