What year did the north Korea become communist?

Answer 1

1948.

Originally Korea was a ruled by kingship, then Japan annexed Korea from 1919 to 1945. After Japanese surrender in 1945, the country was occupied by former Soviet Union and the US. There was discussion among winners of WWII about what to do about Korea. The former Soviet Union want to get the trusteeship of Korea in order to expand communism influence, but the US wanted to get the trusteeship of Korea in order to contain communism. So to each side's concession, the former Soviet Union occupied north of 38th latitude line, and US occupied south of 38th latitude line - half and half. Although the country initially hoped to be unified as was before Japanese occupation, the country's political climate was strongly divided along that line due to each occupied area established temporary government according to the country that was occupied and the tension of cold war between Soviet Union and the US. There were also factions within politics of Korea who were opposed to each other, namely communism or free constitutional republic. Finally, 3 years later when official government was established, North Korea's government became communism, and South Korea quickly fell under the Dictatorship of Syngman Rhee.

By the way official name of each Korea reflect this as well.

Democratic People's Republic of Korea = Korea DPR = North Korea

Republic of Korea = Korea Republic = South Korea

EDIT

Note that during Japanese occupation, Kim Il Sung (first leader of North Korea), supposedly a leader of a Korean anti-Japanese guerrilla unit, was already a communist inspired leader.

Note that communism is not a type of government but instead a socio-economic theory. It is also inappropriate to say that North Korea embraced communism due to the fact that communism calls for the absence of government which no nation in history has had. Therefore it would be correct to say that North Korea's government initially began as a Communist-inspired Dictatorship.
North Korea has been communist since it was founded in 1948

Answer 2

In World War II, the U.S.S.R. liberated northern Korea from the Japanese while the U.S. liberated southern Korea. The Soviets installed a communist government on their side, which became North Korea.

Answer 3

At the end of World War II, the USSR established a pro-communist government based in Pyongyang and then withdrew in 1948. Communist tradition has stayed in North Korea even after the Soviets left, and is still the prevalent form of government in the country up to the present.

Answer 4

The communist government in North Korea was formally established in 1948 after the occupation by Soviet forces that followed Japan's defeat in World War II (1945). The schism between factions in North and South Korea prevented agreement on a unified government (as it did in East Germany) and separate governments were set up in the North (communist) and South (pro-Western).

This followed the takeover of neighboring China by communist factions in 1947. Tensions between the two Koreas led to the Korean War, which lasted from 1950 to 1953.

Answer 5

The Soviets and the Chinese influenced them while the the US and other western countries influenced the south.

Answer 6

North Korea was given independence from the Soviet Union on the 9th September 1948.

Answer 7

North Korea became a communist country in 1941, right after WWII.