It was the Japanese licence copy of Douglas DC-3 Passenger/Transport plane and was used extensively by the Japanese Air force to supply the distant island garrisons and to help the troops whose stationed in low infrastructure areas.
Coloured by me, original drawing belongs to Syuto Koga:
http://www.pixiv.net/member_illust.php?mode=medium&illust_id=31541471
Coloured by the Software: Recolored
https://recolored.en.softonic.com/?ex=CORE-117.5