This leads to a question that frequent visitors to Japan may have an answer to... I haven't been in Japan in over 35 years and then it was a very "cash-only" place.

How much Yen would you suggest be withdrawn at the airport to sustain a few days of an average, middle-class couple's out-of-pocket expenses in Tokyo for cabs, meals, and usual cash transactions? Also, I assume that credit cards are much more useable than during the time I was there years ago?