Study on word play using computer is both computational and artistic challenge.  This study is an attempt on automatic generation of Iroha-Uta poetry using the computer.  Iroha-Uta is poetry containing all kanas without
 duplication and has been composed by the intelligence of humans.  Here, kanas are Japanese syllabic writing system.  Generation of Iroha-Uta is a combinatorial problem of how to choose appropriate words from given vocabulary.  This paper describes an algorithm based on the frequency distribution of kanas and an advanced algorithm using word bigram.