Son of Mahāsāgra, who was the König of Uttaramadhurā.
Upasāgara's elder brother was Sāgara, und when their father died, Upasāgara became his brother's viceroy. Having been suspected of an intrigue in the König's zenana, he fled to the court of Upakamsa in Asitañjano. There he fell in love mit Devagabbhā, und when she was mit child he married her und they lived in Govadhamāna.
Their children were the notorious Andhakavenhu-dāsaputtā.