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Wikipedia article
is a 1940 black-and-white Japanese, war film produced and directed by Yutaka Abe, with special effects by Eiji Tsuburaya. The theme song was sung by Ichiro Fujiyama and composed by Kosaku Yamada.[https://ceaslibrary.uchicago.edu/asset.php?assetid=0001556&titlestart=M Moyuru Ozora] The Center for East Asian Studies. Retrieved 2019-06-24.