This submarine paper model is Type A Ko-Hyoteki Class, designed by udonfactory. The scale of the paper submarine is 1:48. The Type A Ko-hyoteki (Target 'A', Type 'A') class was a class of Japanese midget submarines (Ko-hyoteki) used during World War II. They had hull numbers but no names. For simplicity, they are most often referred to by the hull number of the mother submarine. Thus, the midget carried by イ-16 was known as I-16's boat, or "I-16tou." This class was followed by: Type B, Type C, and Type D.
This is the midget submarine developed by old Japanese Imperial Navy (IJN) from 1931. And Japanese navy adopted her in 1940. Her length was 23.9 meters,maximum underwater speed was 19 knots,and crews were 2 men. She was named the "Ko-Hyoteki" as "a target for antisubmarine attack training" for counterespionage.
The five "Ko-Hyoteki"were thrown into Pearl Harbour attack on December 1941. In the end, none of the "Ko-Hyoteki" Unit returned home. With the exception of Ensign Sakamaki, all 9 crew members perished. Ensign Sakamaki became a first POW of the Pacific War. "Ko-Hyoteki" had some types ,this model is the type used for the Pearl Harbor attack in 1941.
You can download the paper craft model here: WWII IJN Type A Ko-Hyoteki Class Submarine Free Paper Model Download