The Nakajima B6N Tenzan (Japanese: 中島 B6N 天山 - "Heavenly Mountain", Allied reporting name: "Jill") was the Imperial Japanese Navy's standard carrier-borne torpedo bomber during the final years of World War II and the successor to the B5N "Kate". Due to its protracted development, a shortage of experienced pilots and the United States Navy's achievement of air superiority by the time of its introduction, the B6N was never able to fully demonstrate its combat potential.
Source: Wikipedia, "Nakajima B6N", available under the CC-BY-SA License.
As Described In
Aces of the Pacific: The Kate's replacement, the Nakajima B6N Tenzan first saw widespread service in 1944. It was only a moderate improvement over the Kate. It stayed in front-line units until the end of the war.