My father-in-law works in Tokyo, but lives in Kamakura.
He wrote us a long email about his journey home.
Because trains were not running, the only option was to walk the 60+ kilometers home. All along the way, he saw people finding places to sleep in bars, stores, even 7-11s. All of them were full, so he could only keep on walking.
Eventually, he found a bar that had room for him to come and sleep on the floor, so that he could continue his journey home in the morning.
There was no food on the shelves of any store, so people had to share what they had with each other.
Allowing people to sleep in the Apple stores must have been incredibly important to the staff. God knows how they might have fared otherwise.