Things to do in Japan, no research required

Three places that barely feel like the same country, in one import. One is temples and museums at a pace that punishes rushing. One is the mountain town almost every itinerary drops, which is most of the reason to take all three rather than the obvious two. One is restaurants and nightlife at a density nothing else here approaches. Galleries, museums and places to eat all run deep across the set, enough to plan a trip that goes neon streets to temple districts to mountain valleys without opening a new app at every stop.