Tokyo summers are miserable, as are the ones in Seoul and New York City. I have lived in all three and every July/August I wonder if this is the year I start cooling off in Bogota for a month.
all my american friends find it ridiculous, but yes, having lived my childhood in heat that you can see rising off the ground in the middle east, i love the pleasant 30-35C summers of NYC where i live now, especially when combined with the daylight deep into "night", like 8-9pm in June-August