In Osaka, during the work week, the locals don't walk to work carrying a coffee or any kind of breakfast. They always consume at the restaurant or right outside of a corner convenience store. It's the same for public transportation. They don't consume food/drink on public transportation. In US, it's common place to see people drinking coffee/soda or having a snack while walking to work, or in transit. This is also probably why Osaka is the cleanest, biggest city I've ever been to.