HR Beat, you mention the working late culture in Japan - but does the average Japanese person really work longer hours than we do here in Australia ?
Although there is a humorous aspect to this thread, it is worth noting we humans are apparently the only mammals who have only one sleep every 24 hours. So the Japanese, and a few of the European countries probably have it right.
Meanwhile in Hungary, residents are campaigning for a referendum on making siestas a legal requirement! (they do like their referendums in Hungary).