If you're looking for anime similar to Oretacha Youkai Ningen, you might like these titles.
Kiichi is a teacher at hells kindergarten where demon children learn in preparation for taking over the human world in this series of short comedy anime.
The story centers on a fifth-generation kappa who becomes a delinquent and runs away from home. Kappa joins "The Evil Organization" but grows tired of its brutal ways. He and his monster friends decide to reform their lives and live for their hometown, Saga.
If you've bumped into annoying little misfortunes, such as loose socks, uneven disposable chopsticks, mistake rinse for shampoo, etc., that's because of these youkai doing mischief around you.
Tatami-chan is a sardonic ghost from Iwate Prefecture who is now living in Tokyo among other spirits, supernatural entities, and humans. In addition to dealing with otherworldly matters, the unemployed Tatami-chan has to deal with job-hunting as well as paying for gas, water, and electricity.