What are essential items that people in your country use to keep themselves neat and tidy? In Japan, one essential item is a handkerchief.
An electric company conducted a survey about handkerchiefs in 2010. To the question "Do you normally carry a handkerchief or hand towel with you?", 70% of people answered "Yes, I always carry one." If we add another answer -- "Not always, but often" -- then in fact around 85% of people usually carry one.
Handkerchiefs made from a wide variety of materials and in many colours are on display at department stores and large clothing stores. Why don't you drop by the handkerchief section and take a look when you visit Japan?