I visited Japan in the first 6 months after 9/11. Planes were mostly flying at half capacity, attractions around Kyoto were sparsely visited in March/April, cherry blossom sites had very few foreign visitors. It was one of the most relaxing times I have ever visited - at the height of the normally busy time of the year.
My point is that a similar situation may occur after the pandemic settles down and a vaccine has been found and delivered. It may be an advantageous time to consider visiting at a better time of year than January or August.