"O sleep, o gentle sleep, nature's soft nurse" — Shakespeare, as usual, says it best.
We don't sleep well. We are restless, fidgety. We toss and turn. Dropping off at last, we dream uneasy dreams and wake up as tired as when we lay down.
The Japanese in particular are unsound sleepers. The business magazine President cites University of Michigan research that in 2016 ranked Japan last among 100 nations in terms of hours slept per night. Forty percent of Japanese sleep six hours or less. Experts agree: It's not enough.
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