In the Imperial Japanese Navy practice in aviation was given in training Naval Air Groups (NAGs) all over Japan. Edicts on training NAGs became effective in 1930, and the IJN raised many training NAGs, but named these NAGs after location of their home base. In 1944 the IJN gave three-digit numbers to operational NAGs, and left other NAGs, those for training and airfield keeping, unchanged. In the last days they ordered training NAGs to join in operation, namely Kamikaze attacks by young trainees, but basically an NAG named after a location at the end of war, was a training NAG. This aircraft was a typical trainer variant used at Kasumigaura around 1943 and is in colors often seen at this school, including the lower surface color of Trainer Orange.