Godzilla Minus One, is a poignant anti war film as much as it is a monster flick.

I agree with other reviewers that this is by far and away the best Godzilla film I have seen, bar none. What makes it work is a genuinely moving back story of a man broken  by war, redeemed through an act of courage in the service of love, the bonds of family and ultimately life itself. 

Acting is superb, with flawlessly honest, very human performances, from the entire cast. 

Godzilla effects are well done too. The destruction and the misery the monster brings to Japanese cities and their populace, is genuinely disturbing. 

In summary, I loved this film more for its back story than its monster tale. Indeed, in the context of this film, Godzilla feels like a metaphor of sorts, for the real monster, which is war and the destruction it brings both physical and psychological, to innocent lives.