Testing the waters of the “genderless” movement in the fashion industry, Japanese apparel giant Wacoal Corp. added lace to a line of men’s underwear. The dainty items were quickly sold out.

A men’s collection that Torii operated between 1994 and 2000 could be called one of the landmark episodes that prompted a change in fashion consciousness for middle-aged and elderly Japanese men.

Issey Miyake will be showcasing its three-year-old IM Men line during January's Paris Men's Week, the Japanese fashion ...