is a 1969 Japanese epic war film directed by , with special effects by Eiji Tsuburaya. The film stars Toshiro Mifune, Yà «zà  Kayama, Tatsuya Nakadai, Toshio Kurosawa, Makoto Satà Â, Ryutaro Tatsumi, Chishà « Ryà «, and Matsumoto Kà Âshirà  VIII. In the film, the Imperial Japanese Navy and army fail in their attempts to seize Port Arthur, and the Russian Pacific Fleet bears down on the Japan Sea during the Russo-Japanese War.
The film was theatrically released in Japan by Toho on August 1, 1969, and earned , against a production budget of , during its theatrical run, making it the second-highest-grossing Japanese film of 1969.
Battle of the Japan Sea was the last film for special effects director Eiji Tsuburaya before his death. A dedicated team of 60 artists worked on the 107 miniature ships created for the film. In addition, the miniature of the battleship Mikasa was made up to 13 meters long. Due to the weaker shell power during the Russo-Japanese War in the Pacific War, Freon gas was used to represent water column in the naval battle scene.
Battle of the Japan Sea was distributed theatrically in Japan by Toho on August 1, 1969. During its theatrical release, the film earned . It was released on DVD in Japan on June 21, 2001, by Toho Home Video.