I'd think the relevant statistic would be overall amount of sleep, not wakeup time. For all I know, Murakami goes to bed at 9pm every night, which makes that 4

I'd think the relevant statistic would be overall amount of sleep, not wakeup time. For all I know, Murakami goes to bed at 9pm every night, which makes that 4am wake-up time a little more civilized...