Countries:
North Korea
South Korea
China
Japan
Russia

Bodies of Water:
East China Sea
East Sea (also known as the Sea of Japan)
Han River
Korea Bay
Korea Strait
Yalu River
Yellow Sea

Locations of Interest:
38th Parallel
Demilitarized Zone (DMZ)
Jeju Island

Major Cities:
Busan (Pusan)
Incheon
Kaesong
Pyongyang
Seoul