The was a bolt-action rifle

Rifle

A rifle is a firearm designed to be fired from the shoulder, with a barrel that has a helical groove or pattern of grooves cut into the barrel walls. The raised areas of the rifling are called "lands," which make contact with the projectile , imparting spin around an axis corresponding to the...

 of the Arisaka

Arisaka

Arisaka is a family of Japanese military bolt action rifles, in production from approximately 1898, when it replaced the Murata rifle, until the end of World War II in 1945...

 design used by the Imperial Japanese Army

Imperial Japanese Army

-Foundation:During the Meiji Restoration, the military forces loyal to the Emperor were samurai drawn primarily from the loyalist feudal domains of Satsuma and Chōshū...

 during World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

.
During the Second Sino-Japanese War

Second Sino-Japanese War

The Second Sino-Japanese War was a military conflict fought primarily between the Republic of China and the Empire of Japan. From 1937 to 1941, China fought Japan with some economic help from Germany , the Soviet Union and the United States...

 in the 1930s, the Japanese soon found that the 8×57mm IS cartridge the Chinese used was superior to the 6.5×50mm cartridge of the Type 38 rifle

Type 38 rifle

The is a bolt-action rifle. For a time it was the standard rifle of the Japanese infantry. It was known also as the Type 38 Year Meiji Carbine in Japan. An earlier, similar weapon was the Type 30 Year Meiji Rifle, which was also used alongside it. Both of these weapons were also known as the...

, necessitating the development of a new weapon to replace the outclassed Type 38. The Imperial Japanese Army

Imperial Japanese Army

-Foundation:During the Meiji Restoration, the military forces loyal to the Emperor were samurai drawn primarily from the loyalist feudal domains of Satsuma and Chōshū...

 (IJA) developed the Type 99 based on the Type 38 rifle but with a caliber of 7.7mm.