The rivers in Kamiazawara are very clean. So many crabs live in them.
We can see tens of crabs a day.
Some of them live in the river along the road, but more live in the small river by the chestnut tree.
In summer fireflies gather to the rivers. Many people from other places come to see them.
After making the banks of the river concrete, the number of fireflies decreased a little, but still many gather to the river.
They say the rivers are clean because many fireflies and crabs gather to them like this. I want to see fireflies and crabs every year by keeping the rivers clean.

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