Toilet in Japan has two types.
One is the sit-down type as a Western style.
Another is a squatting type as a Asian style.
The sit-down toilet is better to use it.

But some of tidy Japanese people don’t like contact with a stranger indirectly.
So they use traditional squatting toilet against their will.
Therefore recently a mist-spray of disinfectant is prepared at each room in the public toilet.

How to use it.  
1. Cut the toilet paper.
2. Set the toilet paper under the spray.
3. Push the button of the spray and the mist of disinfection will come out. 
4. Clean the toilet seat by a toilet paper.