Winterman, Denise (28 November 2007). “Are you getting enough?”. BBC News Magazine. http://news.bbc.co.uk/2/hi/uk_news/magazine/7114661.stm15 June 2013閲覧. "Napping at work isn't acceptable in the UK, but in Japan dozing anywhere from Parliament to business meetings is allowed. It's called inemuri, which literally means "to be asleep while present"."