Most everybody in Japan carries a handkerchief; there are very few restrooms that provide paper towels and so you carry a handkerchief in your pocket... even my younger students have them. As for me, when I'm there, I use one... of course heavily scented (depending on the handkerchief in question and the season). Usually, I'll douse it in a light, citrus eau de Cologne like Berdoues or Cologne Sologne, in winter, something dry and leathery (Knize Ten works pretty well)... They are also very easy/convenient things to give as gifts... so by now I've probably received a few dozen of them, everything from the usual Japan-favorite Euro brands (Burberry, Fendi, YSL, etc.) to some much more interesting ones made in various traditional Japanese textiles and patterns. Some are so nice I couldn't imagine drying my hands on them or blowing my nose in them...