Konpeki no Kantai: "Secret Launch of the Sorai" "Sōrai kaihatsu monogatari" (蒼莱開発物語)

Konpeki no Kantai: "Sōrai kaihatsu monogatari" (蒼莱開発物語) Deep Blue Fleet: "Secret Launch of the Sorai" Reflecting on the level of US aerial bombardment of Japan in his previous life, Yamamoto proposes a new interceptor, the Sourai, that can successfully take down an expected attack. In early 1940, an engineer and his brother (a test pilot) are assigned the job of developing the plane under tight secrecy. When the prototype is rolled out in late 1941, the test pilot pushes it to the limit by going as high as 10,000 meters. The episode is a backstory to the third episode. All rights are reserved for their rightful owners.