aniki
Initial, partially-formed thoughts on Minus One:
Spoiler - click to showFundamentally, it's about survivor's guilt and PTSD, both on an individual and a national level. Shikishima's not just a failed kamikaze pilot - surviving a war he was ordered to die in, bringing shame on his family and receiving personal blame for Japan's loss - but he's also one of only two people who survived the Godzilla attack at Odo Island, where his inaction cost the lives of the rest of the crew on the base.
Spoiler - click to show(There's also a recurring theme of what it takes to move past that trauma, and how fixating on the past prevents healing.)
Spoiler - click to showThe Japan we see in the film is also reckoning with the consequences of the war, notably the cavalier attitude which the Imperial government and military had to the lives of its people. While it never goes into the specifics of what the Imperial Army got up to in the war (using the kamikaze program as a catch-all for "the fucked-up shit they made us do"), the meat-grinder approach to the troops and the lack of transparency about what they were fighting for (or against) are specifically called out multiple times.
Spoiler - click to showIt's also curious that the Americans are portrayed as basically inert. A handful of references to the firebombing of Tokyo never mention who was burning the place to the ground; there are no American troops shown in Tokyo; and the US military is explicitly absent from the fight against Godzilla, under the excuse that troop movements would provoke the Soviets.
Spoiler - click to showOne major departure from the original 1954 Godzilla - a film that was also openly grappling with Japan's WW2 legacy, albeit from a much closer perspective - is the lack of consideration given to the monster.
Spoiler - click to showIt's barely subtext in '54 that Godzilla is itself a victim of nuclear weapons, and its rampage a direct result of the animal's suffering. One of the characters repeatedly appeals for non-violent solutions, and the opportunity to study the creature's radioactive resilience.
Spoiler - click to showIn Minus One, little thought is given to the reasons for Godzilla's emergence or actions; it's a force of nature that humanity cannot hope to understand or pacify. Notably, however, the plan to defeat Godzilla in this film is actually scientifically sound - this one could actually work, which makes for a nice change of pace from the technobabble that usually handwaves away the finale of these things.