Who looks after the Jizo statues?

It's a long time since I lived in the heart of a big city, but I don't remember seeing Jizo statues often in those years. But nowadays Jizo are a daily presence in my life. They are everywhere in the countryside, not just at temples. Although a Buddhist figure, you can find Jizo on the grounds of unmanned shrines or just on the roadside or at the side of an embankment.

In fact, they are so common sometimes I don't even pay heed to the fact they are there. But today I took stock because this group of jizo statues recently got new hats and bibs. I have no idea who knits for these jizo or any jizo for that matter. If they are on a temple's grounds, it's usually the family of the temple that look after the Jizo. But who looks after them at unmanned shrines and on the country roads? 

An Internet search suggests they are looked after by community groups. But there is jizo in my neighborhood too and they are not mentioned in the neighborhood associations vast remit. And in all my years in Japan, I have never once seen somebody dressing up the jizo! Do you know?  Have you ever caught anyone in the act of dressing up the jizo!?