[1] Johnny matriculated from high school in 1960 and studied at the Bassein Regional College.

[2] In the 2012 Myanmar by-elections, he won a seat in the Pyithu Hluttaw, representing Myaungmya Township.

[5] In the 2015 Myanmar general election, Johnny won a seat in the Ayeyarwady Region Hluttaw, representing Kyonpyaw Township.

[6] Johnny resigned from his position as Chief Minister of Ayeyarwady Region on 9 January 2018, citing health reasons.

In late August, photos of Mahn Johny wearing army fatigues and a large loaded rifle were published and spread on Facebook.