i see, i only worry about how hot the weather can be in aug and scare typhoon strike
For Tokyo, I went first two weeks of August which coincided with the Obon period. In fact I stayed at Disney Resort area for 4D and before that, we were at Odaiba to be close to Tokyo Bay Fireworks Festival. Very hot. Everyday above 35°C. Still alright. Equipped with umbrella, water, face towel, and extra clothes. We did eat more ice cream and chilled desserts though.