What was the most popular Japanese rifle during World War II?

The Arisaka rifle is a family of Japanese military bolt-action service rifles, in production and use since approximately 1897. The Arisaka type 99 was the most common Imperial Japanese service rifle of World War II and most produced imperial rifle with 2,500,000 built. Many thousands of Type 99s and other Arisaka variants were brought to the United States by soldiers as war trophies during and after World War II.