Lanterns line the streets at this time of year in most neighborhoods. The head of the neighborhood comes round and asks if you would like to pay to have your lantern up which can cost anything from a few thousand yen.
If you do decide to have a lantern, you choose a name and they will paint it on the side.
"Chin Chin" can be used to describe the sound of a bell but is usually used to refer to what we call "dolphin."
Here we can see folks lining up to get some baby castella called "Chin Chin Yaki" which look like this.