Summer in Japan differs from region to region, having quite different temperatures and humidity levels from Hokkaidou to Okinawa.
Hokkaidou has a more or less “cool” Summer, easy to adapt to. But here, “in the mainland”, the Summer is really humid, and really hot, be it during the day or during the night, as you can see in the picture below.
Weather forecast to 2012 August 23rd, by http://tenki.jp
Although being quite difficult to adapt to (mainly when one has to study =_=), Japan has a lot of things to offer in Summer (and in every other season!). Summer has a lot of festivals, fireworks displays, and a lot of events and traditions that make Summer a lot more cooler 🙂
Anyway, I’m also looking forward to experience Autumn, because it’s one of the best seasons to come to Japan! ^-^