The men's K-4 1000 metres event was a fours kayaking event conducted as part of the Canoeing at the 1964 Summer Olympics programme on Lake Sagami, Japan.
Three semifinals, each with four crews, were held, with the top three in each heat to advance to the final and three more teams eliminated.
The top three finishers from each of the heats advanced directly to the semifinals; one was eliminated due to not starting, and the remaining 8 teams were relegated to the repechage heats.
Three of the four competitors in each of the two repechages advanced to the semifinals.
The top three finishers in each of the three semifinals (raced on 21 October) advanced to the final.