[3] The name of the dam originates from the old village “Otagiri” (小田切)[4][circular reference] (not "Odagiri").

“Tagiri” is the gerund of the verb “tagiru” (it means the motion of water like “boil”).

[5][6] In Nagano Prefecture there are many such place names like "Tagiri", “Ô-tagiri”,[7][circular reference] "Naka-tagiri",[8][circular reference] “Inu-tagiri”, “Fut-tagiri”, and “Ka-tagiri”.

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