Need Some Help Identifying this Old Shell Casing
Can anyone ID this?
I personally believe it is Japanese but no idea to what. I've researched this extensively since I saw the photos and have no idea. Photos of Japanese shells are not very common. Due to the size, I'm thinking maybe anti-aircraft or naval. Described as 16" tall and 3" shell diameter which would make it 76.2mm which matches several of their guns but I can't find a case length anywhere.
Confirmed it is Japanese: Showa 8/16 = August 1941
https://www.milsurps.com/images/impo.../edM8aqm-1.jpg
https://www.milsurps.com/images/impo.../4zcRw9x-1.jpg
https://www.milsurps.com/images/impo.../q6b3fOw-1.jpg
https://www.milsurps.com/images/impo.../gTCm1hs-1.jpg
https://www.milsurps.com/images/impo.../k8J8glq-1.jpg
https://www.milsurps.com/images/impo.../7oV95VK-1.jpg