Definitely the best season to visit Japan and the spring especially in April, better if in the first 2 weeks. In this period in fact cherry trees bloom, Kyoto with its temples and gardens becomes even more beautiful, a unique experience that will be remembered for a lifetime. It is a period full of matsuri Festivaltraditional Japanese festivals, in parks and temples and friends and colleagues gather to make Hanami 花 見 literally look at the flowers, which are precisely those of cherry trees. Hanami is a picnic under the blossoming trees where each participant brings drinks, food, etc.: you eat, drink, sing together, in short, you have fun.
Very nice is also the autumn period where Japan changes color. Famous is theredness of the Momiji, or the maple trees, which changing color and turning to an intense red color the vegetation for a unique glance.
If unfortunately you cannot travel in these periods when the temperature is mild and pleasant, you can also visit it in August. The period of August is full of parties, fireworks that last up to 2 hours. A period of great celebration which unfortunately is characterized by a warm but above all very humid climate. The experience is still unique, in the end it can be endured!
For some years now, airlines to encourage tourism, even in the low season months, so from January to March, part of May and November, have been offering very low rates on 500 euros including taxes.