Historical photos
G8N1 Type 99 Mk 1 Cannon
Source: https://commons.wikimedia.org/wiki/File:Nakajima_G8N1.jpg
Copyright: This photographic image was published before December 31st 1956, or photographed before 1946, under the jurisdiction of the Government of Japan. Thus this photographic image is considered to be public domain according to article 23 of old copyright law of Japan (English translation) and article 2 of supplemental provision of copyright law of Japan.
Description:Renzan, Japanese Navy's pilot unit heavy bomber during World War II