An Ájívaka. He it was who predicted the glory of Asoka by explaining the prenatal desires of his mother. The queen promised him great honour if his predictions should prove true. Later, when Asoka became king and heard the story, he sent a golden palanquin to fetch Janasána to the palace. On the way, Janasána visited the Vattaniya hermitage where lived Assagutta, and having heard the latter talk of áyatana, his earlier kamma asserted itself and he became a monk, attaining arahantship.
In the time of Kassapa Buddha he was a python who died while listening to some monks reciting a chapter on the áyatanas. MT.190ff.