Jan Mayen
none
Japan
1,770 km approximately
note: seagoing craft ply all coastal inland seas
Jarvis Island
none
Jersey
none
Johnston Atoll
none
Jordan
none
Juan de Nova Island
none
Kazakhstan
3,900 km
note: on the Syr Darya (Syrdariya) and Ertis (Irtysh) rivers
Kenya
NA
note: part of the Lake Victoria system is within the boundaries of
Kenya
Kingman Reef
none