A Very Cerebral War Movie

The Great War of Archimedes (2019).  If you always found the series Numbers (with the backwards 3 instead of e) a bit too light on equations, or really need to know the Japanese for "second order differential equation" watch it on YouTube.  It is the heartwarming story of a Tokyo University mathematician trying to check the cost estimates for the Yamato compared to building an aircraft carrier.  If you know what happened to the ultimate bad decision you find out in the first few minutes.