Oni

Both are short animated films by Kihachiro Kawamoto. Both are based on old legends, so they both have similar historic backgrounds, as well as similar mythological creatures, such as demons or giant serpents. Both are animated using dolls and stop-motion animation. The method of storytelling is also quite similar, as well as the mood and atmosphere they create. 

Both are short, supernatural historical movies setted in feudal japan. Both have supernatura beings (ghosts/demons). Both are done by same director. Both have similar style of storytelling and similar animation. Both are stop-motion anime made with dools.