The Venerable Chanmyay Sayadaw U Janakābhivaṃsa, (Burmese: ချမ်းမြေ့ဆရာတော် ဦးဇနကာဘိဝံသ, pronounced [tɕʰáɰ̃mjḛ sʰəjàdɔ̀ ú za̰nəkàbḭwʊ̀ɰ̃θa̰]; born 24 July 1928) is a Theravada Buddhist monk from Myanmar.

He was born in Pyinma village, Taungdwingyi Township, British Burma, on Tuesday, 24 July 1928.

Starting from 1957, the Venerable Sayadaw spent six years in Colombo, Sri Lanka, where he continued his studies of English, Sanskrit, Hindi and Sinhalese languages.

At the invitation of the state Buddha Sasana Organisation, he took up residence at Kaba-Aye where he edited the publications of Pali Texts.

As recently as July 2015, at the age of 87, he travelled to the UK, Ireland, and Canada giving Dhamma Talks.