How to take a rest in the Japanese town for free?

The title may sounds a bit strange, however at the downtown of Japan, you can hardly take a rest without spending money.

You can't sit on the side of the pavement nor the center.
People are coming and going through on the road busily.
If you try to sit on the part of road, surely they watch at you like you are a strange creature or something incomprehensible.

So you have to find somewhere suitable place to take a rest.
In case of you don't mind to spend money, you can stay anywhere because there are cafes, fast food restaurants or "family restaurants (cheap restaurants)" in every town.
But at least they cost you some money.

Let's keep searching the place to rest for free.
If there are parks or public gardens, that's good.
Maybe you will find some benches in the parks.
Also benches are sometimes set on the space inside temples or shrines.
Where people live, there are always temples and shrines around there.
Keep good manner as a visitor to sacred spaces, then they don't make any complaint to you.

There is one more place I can recommend.
Yes, public library is the one.
They are completely free, besides you can read books in Japanese.
In my case, I am always looking forward to visit local libraries on my travel.
If you can understand Japanese language, there will be another fun place.

In these places, you can take a little rest.
But even if you can feel comfortable there, please don't sleep in public!