I visited the Japanese office of my company once and it struck me how much wasted time people put in the offices. They'd stay at the office super late, but nap

I visited the Japanese office of my company once and it struck me how much wasted time people put in the offices. They'd stay at the office super late, but nap for ~hours during the daytime! I think that there is a cultural pressure to show face and be physically present for a long period of time that is unrelated to actual productivity or performance.