From: Chuck Guzis
I suspect that other languages have similar exercises,
though
I don't know what the Japanese do in Kanji.
Err, think you mean kana, right? (Kanji are the ideograms, there are over a
thousand in common use.) There is something called the 'iroha':
http://en.wikipedia.org/wiki/Iroha
which is a poem which uses every element of the Japanese syllabary - and
exactly once! It was used to teach writing, no idea if it's used for the
keyboard thingy.
Noel