
You cannot move the day, so the day has to move. Several of the best things in Japan are better in rain.
You booked the flights months ago, and the forecast did not ask you first. Japan is unusually good at wet days. The indoor half of the country is not a consolation prize — a great deal of it was built for exactly this weather.
Three things are true on a wet day. An outdoor hot spring in rain is quieter and warmer than in sun. A covered market is dry from end to end. And a museum here is often the single building a town was built around.
An outdoor bath in rain is the one experience that improves. The water is hot, the air is cool, and everyone else stayed in.
Covered arcades and market halls run for hundreds of metres. You can eat, shop and stay dry without once opening an umbrella.
These are not places to wait out the weather. Each is a reason people come to the town at all.
A cave is the same temperature and the same dry floor whatever the sky is doing.
A workshop is dry, warm, and gives you the day back: you leave with the thing you made.