Also stayed exclusively in Airbnbs when traveling in Japan. The hosts usually explained the rules how to sort the trash, including the removal the cap on the w

Also stayed exclusively in Airbnbs when traveling in Japan. The hosts usually explained the rules how to sort the trash, including the removal the cap on the water bottles, and showed where to put the trash (on this random trash pile next to the building). Not sure about the balcony usage, but I'd would probably use common sense and not be yelling there or using it in the middle of the night. Also I don't smoke but seems as smoking goes, the rules were pretty liberal in Japan. I don't see these being issues, if the host explains the customs, obviously you cannot expect that everyone knows all your countries rules. On a side not its interesting how many different ways there is to sort trash.