The Nana Maru (南阿丸) was a Japanese cargo ship from the Seia Maru-class, which was sunk in military service by ML-KNIL Brewsters during World War II.

On 29 June, construction was finished and the ship started service between Japan and South Africa.

[2] On 23 January 1942, during the Battle of Balikpapan, the Japanese troop convoy of which the Nana Maru was part, was attacked by Dutch aircraft in the Makassar Strait at 00°10′N 118°00′E / 0.167°N 118.000°E / 0.167; 118.000.

Stoové of the 2-VLG-V squadron dropped their bombs upon the ship's deck.

At 17:30 the captain ordered abandon ship, and at 21:00, after a large explosion, the Nana Maru sank to the bottom of the ocean.