As much as it's awful and real about global warming, I was in Tokyo 2 weeks ago, and noticed something pretty crazy - Japanese people wear a lot of long-sleeved clothing in the summers, like full-on suits and even sweater/skirt combos.
I don't know much about their dressing culture, but man, from July 22nd to the 28th, it was nasty humid in that city, more so than when i went to the Philippines later on. I was outside all the time, and I only wore sports shorts and a t-shirt, and i was sweating terribly, so I can't even imagine why anyone would be forced or choose to wear stuff like that. If it's a choice, then man, maybe Japan should put out a notice to dress lightly in the summertime heat, and pass something along the lines of people being allowed to go to work in their casual clothing and being able to bring their clothes to work and get dressed from there.
I dunno, it's something, and they definitely have similar procedures in Japan in terms of preparation and looking out for one-another's day-to-day health (exclusing the work culture, that is), so it doesn't sound extreme, imo.