As the season changes from the cold and relatively dry winter, to the hot, humid, rainy summer, many changes had to be made to ready the house for the totally different weather. This is something very new for me, since Perth's mild Mediterranean climate did not require drastic changes to things in the house between winter and summer. The other thing is in Japan insects stay relatively hidden for most of the colder months and then suddenly come with a bang in June. In order to keep them out of the house we had to change many carpets and rugs to tatami type mats and then purchase a lot of (environmentally friendly) insect killers.
To give you an idea of the amount insects in the summer here's a recording made in mid July of the cicadas in the trees near my house, note the sound sometimes get even louder than on this recording. They start their noise at 6am and continue to 6pm. It's good they are quiet at night, but if you're near a rice field then at night you will hear the frogs. Actually, it's a good thing you can hear frogs because it means the farmers a not using too strong chemicals on the rice. I heard in some other countries the chemicals used a so strong that it kills all the frogs!
The sounds of cicadas:- http://www.global.net.au/~jamesc/audio/cicadas.mp3