An arahant. In a previous birth he saw Padumuttara Buddha journeying through the air and wished to offer him some water. He, therefore, threw some water into the air, which the Buddha, out of compassion, stopped to receive.
Sixty-five kappas ago Udakapūjaka became king three times under the name of Sahassarāja (Ap.i.142-3).
He is probably identical with Kutivihāriya Thera. ThagA.i.129.