Greg Dorr’s review published on Letterboxd :
Dumbly billed as "The Sound of Music meets Dawn of the Dead," I can't say I saw much of either classic in The Happiness of the Katakuris. Although the family is prone to breakout into musical numbers with little provocation, the songs aren't particularly enjoyable, interesting or narratively valuable. They're the kind of songs that someone would write if they've never given any thought to how musicals work. Although death is a large factor in the Katakuris' new troubles, zombies make only a cameo appearance (during yet another musical number) with no impact on anything. The Happiness of the Katakuris tries to be a little bit of a lot of different things, but mostly only succeeds at being weird for weirdness' sake, and that only works about 25% of the time.