Why is Japan so obsessed with punctuality?

Why is Japan so obsessed with punctuality?http://www.telegraph.co.uk/travel/rss.xmlTravelwww.telegraph.co.uk for the latest news from the UK and around the world.http://www.telegraph.co.uk/etc/designs/telegraph/core/clientlibs/themes/cars/img/favicon/apple-touch-icon-114×114.pngTravel887Danielle Demetriou -geoquono-