Inside the 142-Meter Frigate the US Navy Wants From Japan

On 1 September 2026, the US Navy put Japan's upgraded Mogami-class frigate on a shortlist of three foreign designs, next to South Korea's Chungnam class and Turkey's Istanbul class. Three days later, Tokyo admitted the first two of those frigates hadn't even been laid down. So why would Japan hesitate to sell its best new warship to the world's most powerful navy? This documentary goes inside the ship America is studying. We follow the Mogami class from the keel laid at Mitsubishi Heavy Industries' Nagasaki Shipyard in 2019 to a warship run by about 90 sailors from one integrated control room, then look at the upgraded 142-metre design, with 32 missile cells in the same Mark 41 launcher the US Navy already uses. On the American side: why the Constellation-class frigate was cut back, why US shipyards are short of capacity and skilled workers, and the "Finland model" that would build the first ships abroad and the rest in American yards. On the Korean side: a Chungnam-class frigate already in service, and Hanwha's shipyard in Philadelphia. And the part most coverage skips: Japan's yards are already booked for its own navy, for Australia and for two large Aegis ships. Japanese industry is reported to be hesitant, and the reason is capacity, not politics. Status: no decision has been made. The Navy's study is expected in November 2026, and Japan has not said whether it will bid. Some scenes are visualizations created for this film, including the upgraded frigate (not yet built), the shipyard construction scenes and the control-room interior. Japan's 32 cells and 90 sailors, or Korea's frigate that's already at sea: which would you pick for the US Navy? Tell us in the comments, and subscribe to Nihon Forge for more on how Japan builds its warships. 0:00 The two-line answer from Tokyo 2:31 Why America is shopping abroad 4:45 Inside the Nagasaki build 5:55 A warship run by 90 sailors 6:44 The upgraded design and its 32 cells 7:34 Korea's rival frigate 8:34 The Finland model 9:32 Why Japan might say no 11:43 Korea's American shipyard 12:49 Congress and the November deadline 13:17 What Japan gains, what it keeps 14:44 Japan builds for itself first #MogamiClass #USNavy #JMSDF Disclaimer: Synthetic Media & Content Generation The visual and audio content in this video, including voiceovers and photorealistic representations of aerospace and industrial environments, was generated using advanced artificial intelligence tools. Modus Assembly utilizes AI strictly as a visualization and production mechanism. This content complies with YouTube's Altered and Synthetic Content policies.