Beside the shrine is a small shop in the form of a stand which has various charms/amulets for sale. This box contains Omikuji - place 100 yen
in the slotted compartment and take a dip from the hole to pick out a fortune.
If it says something good then you can be happy. If it says something like "your hands will smell like banana skin for the rest of your life" then you need to tie it to a fence to make sure it does not come true. Unless you like bananas.