horizontal text backwards?

Hi! I was reading No Longer Human by Junji Ito (in english) and noticed this sign and it perturbed me. I studied japanese for 3 years in college and I never thought horizontal text could be written from right to left. Oh, I can’t put a picture 🙁 So, it says

らくまか
倉鎌
KAMAKURA
しず|らくまかたき

Someone please help me understand why the horizontal japanese is written backwards!