This summer, encouraged by the government’s Super Cool Biz campaign, Japanese men are daring to bare a bit more flesh. As neckties and heavy blazers are discarded, almost anything goes, and many braver businessmen are now sporting calf-length trousers, polo shirts and "aloha shirts." For the first time female colleagues are seeing their male coworkers in a whole new light, but according to a poll by Nikkei Woman Online, there’s a fine line to be drawn between kakui (cool) and kakkowarui (unattractive).

The poll, published in Nikkei Trendy, reveals that too much flesh in the office can be a bad thing. Revealing tank tops were the most objectionable office-fashion item, with 90 percent of 409 respondents rating this "NG" (thumbs down). Shorts came in a close second, at around 80 percent NG. While most women did not object to plain short sleeve shirts, if the material is sheer, around 60 percent of respondents preferred men to wear a vest underneath to cover up exposed nipples and chest hair.