''The Type 99 was introduced as a modern monoplane replacement for the "Type 96 Biplane".<br>Although it was a slow aircraft with fixed landing gear, it formed the core of the attack squadrons along with the "Type 97 Torpedo Bomber" in the early days of the carrier task forces.<br>In the model 22, a late-stage upgrade, its engine was replaced to improve speed.<br>Despite this, it is still obsolete compared to newer aircraft introduced late in the war.