5. Sleep

Japanese spend less time asleep each night than people in many other countries, a situation that may derive from a 24-hour, on-the-go culture, and a strong work ethic. Demand for quality sleep has prompted hotels, long-distance buses and other businesses to offer special sleep-related services, while some companies have even introduced naps to improve efficiency. Our expert guest is Prof. Yukio Toyoda, who studies sleep in Japan from the viewpoint of sociology. And in Plus One, sleeping baby art.