If you loved Eat the Schoolgirl: Osaka Telephone Club, try Zombie Self-Defense Force
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

Eat the Schoolgirl: Osaka Telephone Club
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Zombie Self-Defense Force
What they share
Both films are directed by Naoyuki Tomomatsu, and they sit in Horror territory. If that's the register that drew you to Eat the Schoolgirl: Osaka Telephone Club, the second film will land in a comparable space — through a different lens.
What Zombie Self-Defense Force is
Abandoned streets on a rainy night a crashed UFO. Soldiers and civilians barricaded in a hotel. A staple of Japanese horror.