From what I've read, experts are predicting a big resurgence starting in the fall and continuing throughout the winter. That would make even Spring 2021 possibly infeasible. The only hope is the vaccine, but that's still probably a ways out despite the money being thrown at it.

Oh and August is no doubt the worst time to visit. I did once and never, ever did it again. Any other season is preferable, unless you have a specific reason like climbing Mt Fuji.