His family said he died in a Yangon hospital after a long period of ill health.
His work won him international honors, but in his own country his accomplishments were rewarded with jail time and a quarter-century ban on foreign travel.
Sein Win was The Associated Press' correspondent in Yangon, Myanmar's largest city, from 1969 to 1989. His daughter Aye Aye Win has held the job since then.
He worked under Japanese occupation, British colonialism, parliamentary democracy and military rule. He lived long enough to see censorship lifted, and the return this year of private daily newspapers under the elected government that took over from the military in 2011.
"In my experience as a journalist for over 40 years under various types of governments, I always find the independent press as a suspect and victim of the governments," he said in a 1989 speech to the International Press Institute in Berlin.
The son of a junior civil servant, Sein Win was born Feb. 12, 1922, in Kyaunggon, a town west of Yangon, which at the time was the capital and known as Rangoon.
