If you were going to Japan for the last time for a while (or ever), what would you do, where would you go for this last trip?

We went twice, 10 days and 22 days. We went to Tokyo, Kyoto, Osaka, Fukuoka, Nagasaki, Hiroshima. We visited the standard/common tourist spots.

Going this summer again for 24 days. Current plan: Tokyo -> Sapporo -> Fukuoka -> Himeji -> Osaka -> Kyoto -> Yokohama -> Tokyo.

We've NEVER been to Mt.Fuji, Hakone, Enoshima (went to Kamakura and the train was jam packed), Nikko, etc. We never stayed at a Ryokan.

We are planning to do daytrip to Nikko (from Tokyo) and/or Hakone (from Yokohama).

Our last leg will be a week in Tokyo. We are going to shop like crazy then.

We are not planning to rent a car. We are a family of 4 with two teenagers.

We like Japan a lot, but I think this third time will be our last for a while.

Where would you go, and what would you do there if this were your last trip?