Known by academics as species highly sensitive to water quality
and temperature, "Ibaratomiyo" fish live only in
very fresh and clean water areas. Omigawa River is one of
few rivers where the precious kind of fish inhabits.
The original water source for Omigawa River is "Jizo-numa"
spring, which generates ample volume of fresh spring water
that flows into the river.
The entire region is a home of a number of natural springs,
and each of them is locally called "Donko-sui" or
Donko water.
For the purpose of nature conservation, a number of measures
are taken such as making ditch to prevent non-natural water
from flowing in.
Location: Higashine City, Yamagata Prefecture
Transportaion: 10 minutes by taxi from "Kamimachi"
station on JR Ou Honsen Line
Contact: Higashine City Tourism Association 81-237-41-1200
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