on the Russian-Chinese-american-hirohshima peninsula
North Korea itself is not a peninsula. Along with South Korea it is on a peninsula known as the Korean peninsula. North Korea forms the start of it and South Korea is the end of the peninsula.
South Korea and North Korea are the two countries located on the Korean peninsula.
North Korea and South Korea
North Korea and South Korea
North Korea and South Korea 
The Korean Peninsula is located in Eastern Asia and is shared by North Korea and South Korea.
the Korean peninsula: includes both south and north Korea
Korea is a peninsula divided in 2 countries. North and South Korea. It is located south of china and south of russia.
The Asian Countries that occupy the Choson Peninsula (Hanguk Peninsula in South Korea, Korean Peninsula in English) are North Korea (the Democratic People's Republic of Korea) and South Korea (the Republic of Korea). This peninsula extends from Asia between the Sea of Japan & the Yellow Sea.
South Korea and North Korea are both countries and are located on the Korean Peninsula. North Korea is partly bordered by China and they are both on the Pacific Ocean.
North Korea and South KoreaNorth Korea and South Korea.
Korea is two countries (North Korea and South Korea) on a peninsula.