Tokyo for 3 days...walked almost all of of the city.
If we assume that Mrs. Bambi walks at a brisk rate of 5mph and slept a grand total of 0 hours while she was there, eating only from places from which she could grab portable food, and the average accounting for potty breaks, that would have allowed her to walk 360 miles.
If everything she walked was a mile wide, she'd have seen almost half of it... since Tokyo is 847 sq miles. Another mph and she'd have gotten to half!
But she doesn't walk 5mph. She didn't do it for 72 hours straight, let alone without substantial stops. A "mere" 8 hours of sleep per night, at 4mph while walking, still without breaks in the day, brings it down to 192 miles walked.
Helluvan athlete, that Mrs. B.
8 hours a day at a pretty healthy 3mph is probably still pushing it, with no repetitive walking somehow. Quite an aggressive pace to manage for three days in a row, but let's grant it.
72 miles covered.
I leave it to you to figure out the rest of it.