Italy
18 years of age; universal (except in senatorial elections,
where minimum age is 25)
Jamaica
18 years of age; universal
Japan
20 years of age; universal
Jersey
18 years of age; universal
Jordan
18 years of age; universal
Kazakhstan
18 years of age; universal
Kenya
18 years of age; universal
Kiribati
18 years of age; universal
Korea, North
17 years of age; universal
Korea, South
19 years of age; universal