It's a live-action crossover between GeGeGe no Kitarou and Akuma-kun. No problem with that. Happy to give it a whirl. There have been crossovers between them in other media, but this is the only live-action one I know of. I can't recommend it, alas, but it would have been okay if it weren't for the child actors.

Motoyoshi Wada (Kitarou) and Etsutaka Yose (Akuma-kun) are the correct age... and that's the only thing they have going for them. Neither of them acted in anything else afterwards, according to imdb. Yose does nothing wrong, admittedly, but Wada's a sullen block of wood. He almost never smiles. He's so boring that my broken brain even disliked the fact that he's male, given my memories of Minami Takayama in the 2007 live-action specials. (She's still the best live-action Kitaro I've seen. Mind you, a female Kitarou would have been awkward here when he bathes in a river and gets attacked by a kappa.) Wada's better when he smiles (which he does once, when saying "I've always been a ghost"), but he's generally a Kitaro-shaped hole in the film. He kills what would otherwise have been a decent viewing experience.

Also, they've cast a man (Kouen Okumura) as Sunakake-baba. Seriously, what the hell? There's no reason for the gender switch and Okumura's nothing special in the role.

However, the rest of the film is fine. I liked the opening, where Kitaro's gang are so impoverished that Nezumi-Otoko tries to eat a rotten watermelon that was lying on the ground. They haven't eaten for two months. That won't kill a yokai, but they're still so hungry that Nezuki-Otoko starts hallucinating that Eyeball Dad is food and tries to eat him. Humans destroyed Kitaro's house while building a highway. "Octopi don't have bones, jellyfish don't have eyes and we don't have money."

The film's more Kitarou than Akuma-kun. The latter writes Kitarou a letter, asking for help finding a teacher who disappeared after falling in love with a yokai. ("As you know, I consider myself the kind of genius who only appears every 10,000 years, but I'm hiding that fact and attending school as a regular kid.") Later, we meet the devil Mephisto, with a mighty prosthetic nose.

Attractive female yokai will steal your life energy and one says "seiki wo morau wa". (A correct translation would be "I'll steal your life energy", but "seiki" also means "genitals".) Nezumi-Otoko doesn't smell a rat when a sexy woman claims to be attracted to him and asks him to drink from a smoking cauldron. He wakes up with maggots falling on him. Needless to say, Nezumi-Otoko's still untrustworthy and will backstab any ally, be they heroic or villainous.

Things I liked include:

1. The practically created, faithful versions of Mizuki Shigeru's wacky yokai designs.

2. The cast's nothing to write home about, but I ended up liking Akira Shioji as Nurarihyon. He brings a little weight to the role. I believed in this old, intimidating supervillain.

3. I quite liked the can't-be-together love story conclusion.

4. I LOVED Mizuki Shigeru's double cameo. He's a painting postman at the start of the film, then returns right at the end. I got even more joy from that than Go Nagai's occasional cameos in Kekko Kamen, Cutey Honey, etc.

5. And, of course, it has The Theme Song.

Had Motoyoshi Wada been watchable as Kitarou, I'd have enjoyed this film. He's not, so I spent my time scraping together redeeming features.