日本九九式7．7mm步枪是日本在二战结束前以三八式6．5mm步枪为基础改进发展的新一代军用制式步枪,主要用于对外侵略作战。由于二战后期的日本已陷入重重困境,为做最后挣扎,继续加紧侵略作战,日军需要大量九九式步枪,但当时生产材料不足,且缺少熟练技工,因而武器粗制滥造,名声糟糕。其他战败国如德国在二战末期也有类似情况。九九式是旋转后拉枪机式非自动军用步枪,日军采用该枪作制式有其自身考虑。当时的日本不具备用半自动步枪作为制式步枪的基础,因为半自动步枪的弹药消耗量比旋转后拉枪机式步枪大,如果不能确保弹药的及时供应,半自动射击的火力优势就无法实现。二战中,全军采用半自动步枪作制式的只有美国,其他国家与日本一样,步兵的主要装备是旋转后拉枪机式步枪。德国与苏联只是部分部队采用半自动步枪作制式。 Japan’s JI-JUN 7.7mm rifle is a new generation of military-style rifles that Japan improved and developed based on the March-August 6.5mm rifle before the end of World War II, mainly for external aggression. Japan, in the latter part of World War II, had been in such a difficult position that for the sake of its final struggle and continuing to step up its aggressive operations, the Japanese needed a large number of Jiu-Ji rifles. However, due to insufficient production materials and lack of skilled workers, Japan was poorly rented. Other defeated nations such as Germany also experienced similar situations in the late World War II. Ninety-nine type is a revolving pull-bolt non-automatic military rifle, the Japanese military used the gun for its own consideration. At the time, Japan did not have a semi-automatic rifle as the basis for a standard rifle because semi-automatic rifle ammunition consumed more than a revolver rifle-style rifle, which could not be achieved without the timely availability of ammunition. In World War II, the whole army only used the semi-automatic rifle for the production of the U.S.A. As in Japan, other major equipment for the infantry was a revolver-pull rifle-type rifle. Only some of the troops in Germany and the Soviet Union used semi-automatic rifles for the system.