Well done! I would love to know how they made this film on its reported budget of $15M. It's a period piece set in the late 1940s and a kaiju disaster movie, and it feels way, way bigger than I could have imagined for the amount of money they spent making it.
More importantly, they made a genuinely interesting human story about a man who - for most of the film - is haunted by survivor's guilt and the belief that his actions as a Kamikaze pilot in WWII were cowardly. But ultimately it becomes a film about how the Japanese government under Hirohito didn't care about the lives of its people at all and how after the war and disarmament left them defenseless against a giant radioactive monster, private citizens voluntarily working together to protect lives find creative solutions to the threat without needlessly sacrificing each other.
It's a heroic film. It's full of pathos. It knows how to anchor a story around a likeable protagonist you actually root for and who has a real arc from start to finish. The stakes are clear and important, and it left me with a sense of pride for humanity.
I have very few critiques, and those I do have either come down to the limits of CGI on a shoestring or some differences in personal preferences as an editor (a few too many scenes fade to black or otherwise conclude a little awkwardly, but some of this may simply be a cultural gap). The story is really solid.
If you're willing to watch a film with subtitles (and, c'mon... It's not that hard) take advantage of the fact that this is getting a wider release after a strong opening week. See it in a theatre.