In Japanese calligraphy (and of course in other asian one), paper isn't the only medium on which characters are written; you can inscribe characters on stone and wood pieces as well. This branch of calligraphy is called kokuji (刻字; literally "engraving character"). And I recently made a kokuji piece of a Japanese traditional half-in-fun doodle 'henohenomoheji.' Henohenomoheji is a n emoticon composed of seven hiragana Japanese phonograms, which are he (へ), no (の), he (へ), no (の), mo (も), he (へ), and ji (じ). Check the Wikipedia entry ' Henohenomoheji ' for more details (I'm slothful, sorry). But let me add some more info. First of all, it is so subcultural that, although it's known by every Japanese person, it's been little introduced overseas. Secondly, this doodle is very traditional. As you may imagine, it's not academic enough to study, and the history is unclear. But according to Satoshi Kako (1926-), a famous picture b...