If you loved Attack Girls' Swim Team Versus the Undead, try Onechanbara: Bikini Samurai Squad
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Attack Girls' Swim Team Versus the Undead
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Onechanbara: Bikini Samurai Squad
What they share
Theysit in Action / Horror territory. If that's the register that drew you to Attack Girls' Swim Team Versus the Undead, the second film will land in a comparable space — through a different lens.
What Onechanbara: Bikini Samurai Squad is
Ruined Tokyo, sometime this century. Rotting flesh and a high, keening giggle. Aya hunts her father's killer, her blade the only thing between her and a zombie horde, her bikini somehow staying on. Peak mid-aughts J-horror knows its audience.