Japan
total: 42.3 years
male: 40.5 years
female: 44.1 years (2004 est.)
Jersey
total: 40.3 years
male: 39.6 years
female: 41.1 years (2004 est.)
Jordan
total: 22.2 years
male: 22.8 years
female: 21.5 years (2004 est.)
Kazakhstan
total: 28.3 years
male: 26.6 years
female: 30 years (2004 est.)
Kenya
total: 18.6 years
male: 18.5 years
female: 18.7 years (2004 est.)
Kiribati
total: 19.8 years
male: 19.4 years
female: 20.3 years (2004 est.)
Korea, North
total: 31.4 years
male: 30.2 years
female: 32.6 years (2004 est.)
Korea, South
total: 33.7 years
male: 32.8 years
female: 34.7 years (2004 est.)
Kuwait
total: 25.9 years
male: 28.2 years
female: 22 years (2004 est.)
Kyrgyzstan
total: 23.1 years
male: 22.2 years
female: 24 years (2004 est.)