Asia
We track 47 countries in Asia. The average current leader has been in office 2,785 days (about 7.6 years). The longest-serving is Emomali Rahmon of Tajikistan, at 11,609 days. By the Regimes of the World classification, 12 countries count as democracies and 34 as autocracies.
Regime classifications follow the Regimes of the World scheme (V-Dem), via Our World in Data.