Garbage collection area

I'm new to Japan and I went to leave out my garbage this morning following the map my landlord gave me. It lead me to an area that had cameras and a sign saying dumping is prohibited by the police.

I brought the garbage back to my house, but I have no idea what I should do next. Who do I contact to find out where to leave my garbage? I haven't met or seen any of my neighbours yet, so I can't ask them. I'd like to solve this as soon as possible so the garbage doesn't pile up. Please help!

by nikrah-esioan