Oh yeah, this'll work

The Japanese government is trying to promote casual summers. With office thermostats set as high as 82F (so says the article — I'm guessing that's actually 28C), coat and tie just isn't comfortable.

This will probably have the same fate as the famous attempt to cut working hours in Japan, where death from overwork — karoshi — is fairly common. A committee was formed, and they set about the task of convincing businesses to shorten the work day. Alas, as working long hours is seen as a sign of dedication to the company, this proved a difficult task, and the committee soon found itself working large amounts of overtime — and their efforts were commended by their political masters.

It's just not so easy to change a culture, even Japan's, by diktat.