The official website for the live-action adaptation project based on Kaiji Kawaguchi’s political-military manga The Silent Service announced today that its second theatrical film is set to release in Japan on September 26, 2025. The subtitle for the second movie is “Hokkyokukai Daikaisen,” which is translated to “The Great Sea Battle of The Arctic Ocean.” On the website, a teaser visual — depicting Yamato diving into the deep sea between the icebergs with the Northern Lights in the sky — and a behind-the-scenes clip showing the filming that took place from August to October were also released.
Kawaguchi’s original manga was serialized in Kodansha’s Weekly Morning magazine from 1988 to 1996, then compiled in 32 tankobon volumes with a total circulation of 32 million copies (paper and digital).As Amazon Studios’ first Japanese theatrical film, the first live-action project’s feature film released in Japan on September 29, 2023, earning 1.37 billion yen (9.02 million USD) from its total domestic run. The eight-episode web drama series, The Silent Service Season One – The Battle of Tokyo Bay, followed on Amazon Prime Video in February 2024.The sequel film will focus on the “Great Sea Battle of the Arctic Ocean,” a torpedo battle in the cold northern seas, and the “Yamato Election” episode, which was made into a TV special at the time of the original manga’s serialization in Japan.”After escaping from Tokyo Bay in the previous episode, Yamato will enter into the biggest and toughest battle against the U.S. military,” said lead actor and producer Takao Osawa. “In the political block, Prime Minister Takegami’s general election coincides with the current situation in Japan, and new characters appear who will greatly influence the fate of Yamato. The film is packed with more intensity, thrills, and excitement than its predecessor. Yamato, the U.S. military, the politicians, and the news media — we hope you will also pay attention to the interplay of emotions and conflicts between each of these characters. I am confident that we will be able to deliver a world far beyond your imagination. I sincerely look forward to the day when you will be able to experience this film in a movie theater.”
The synopsis of the sequel film reads (translated):
Yamato submerges in the cold, deep northern seas with Mozart’s music echoing. The nuclear-powered submarine, named the “Great and Powerful Peace,” overwhelmed the U.S. Seventh Fleet in the Battle of Tokyo Bay and set course for New York. As it approached the Bering Strait, the border between the U.S. and Russia, a submarine loomed behind Yamato…“Sink the nuclear terrorist Yamato!” It is a cutting-edge U.S. submarine, far superior to Yamato, sent by the U.S. President Bennett. At the same time, a general election is held in Japan to dissolve the House of Representatives. Prime Minister Takegami announces his support for Yamato, and the two will share the same fate, whether they remain or sink.Will Shiro Kaieda be able to overcome the greatest challenge of the voyage? Under the aurora borealis, in the Arctic Ocean with floating ice floes, the curtain rises on the battle to be fought.
Source: “The Silent Service” live-action project official website / X (formerly Twitter), Amazon Japan Press Release©Kaiji Kawaguchi/Kodansha
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