What do japanese people sleep on?
Both of the above paragraphs refer to sleeping at night: for naps, in Japan daily people can be seen sleeping on school desks (during lectures), on train and bus seats, and, often, during meetings and the like. However, most Japanese, even the homeless, sleep on _something_, even if it is simply a newspaper. Sleeping directly on the ground or some other surface upon which shoes are likely to have been, is very unusual. (Passing out from drink on such surfaces, however, is not.
