A keycap is a small plastic or metal cover, placed over the key switch of a keyboard. They indicate the key function or alphanumeric character they correspond to and are primarily manufactured for decorative purposes. Keycaps featuring hiragana sub legends have become increasingly popular among keyboard enthusiasts and we bring you the best Japanese keycaps to choose from! The japanese keycap is very simple and stylish. Japanese keycaps are made of abs material, with smooth lines and bright color, not easy to fade.