JUNK HEAD
In the distant future, mankind attains longevity through gene manipulation. However, in exchange, the ability to reproduce is lost. Clones were built to maintain the dwindling workforce, but 1,200 years ago they rebelled. The humans, suddenly finding a need to understand their subterranean-dwelling creations, launch an ecological study.
Starring Takahide Hori, Atsuko Miyake, Yuji Sugiyama
It's a action & adventure and animation movie, and has a rating of 7.4 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Singapore.