Just saw this at the Calgary Underground Film Festival and am kind of at a loss to describe this film. I'll admit I was very disappointed that the version screened was an English dub as the Japanese cast was stellar and I'm a big fan of both Daisuke Ono and Naoki Tanaka (from Cocorico).
Violence Voyager is very firmly rooted in the ero-guro-nansensu movement, with a heavy emphasis on the grotesque and absurd. The animation is done with painted paper cutouts that occasionally interact with 3D elements, this style is very similar to the 2007 version of Dante's Inferno which was animated with cardboard puppets. Everything about Violence Voyager is a labour of love, from its creation by one man, to the creation of the park in the story (also by one man), love is the main motivator of all characters. There are many references to kaiju and tokusatsu films ( I mostly spotted Gamera monsters like Guiron). This film is not for the easily disturbed and there is a lot of body horror, child nudity, and violence. While there's a lot of laughter to be had it's mostly out of bewilderment and general absurdity rather than the genuinely comedic. In all this is a great film to go blind into if you love the truly bizarre and underground, or have a passion for guro.
Skip the English dub if you're able.