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It's a daily struggle known to office workers the world over: a productive morning rewarded with a decent lunch, and then, at about 3pm, the leaden eyelids and urge to snatch 40 winks.
In Japan, where workers get less sleep on work nights than those in other countries, more and more companies are encouraging employees to sleep on the job, convinced that it leads to better work performance.
Okuta, a home renovation firm near Tokyo, allows its employees to take a 20-minute power nap at their desks or in the staff lounge. Introduced two years ago on the orders of the firm's chairman, Isamu Okuta, it has proved a huge hit.
"If I use a calculator when I'm sleepy, I have to double-check my work for fear of making mistakes, so it takes longer," Ikuko Yamada, who works in accounts, told the Yomiuri Shimbun newspaper. "I think my work performance has improved since I started taking naps."
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