If you loved Meatball Machine, try Yakuza Weapon
A bridge between a film you've already seen and one most people haven't. Yakuza Weapon has roughly 4.2× fewer votes than Meatball Machine — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Yudai Yamaguchi, and they both carry the body horror mood tag, and they sit in Action / Science Fiction territory. If that's the register that drew you to Meatball Machine, the second film will land in a comparable space — through a different lens.
What Yakuza Weapon is
Island dusk. A cicada's drone. A son returns. His yakuza-boss father murdered, young Shozo seeks vengeance on a gangland traitor. Both fighters fall in ruin, only to rise again remade as cyborg killers. A gonzo remix of Fukasaku and early Cronenberg for midnight movie fans.

