When should I make a reservation for a hotel in Japan?

pu1. I tend to book an accommodation with a flight ticket 3 months ago. Then it's easy to get and the price is reasonably low

2017-12-20

OK

pu2. It's important when you go, but in the case of cherry blossom viewing or autumn foliage viewing in spring, there may be no accommodation you want because there are so many Chinese people coming. In that case, it's better to make a reservation as soon as possible

2017-12-20

OK