Kōchi Prefecture Kōnan has a humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light snowfall.

[2] Per Japanese census data,[3] the population of Kōnan declined by roughly 25 percent from 1950 to 1970 but subsequently rebounded, peaking again around 2010.

During the Edo period, the area was part of the holdings of Tosa Domain ruled by the Yamauchi clan from their seat at Kōchi Castle.

Kōnan has a mayor-council form of government with a directly elected mayor and a unicameral city council of 22 members.

In terms of national politics, the village is part of Kōchi 1st district of the lower house of the Diet of Japan.