Abstract
Japanese rice fish is a fresh water fish that represents the paddy field area. In this research area, Kanzaki district in Iwate Prefecture, a farm land consolidation is planned in fiscal 2007, therefore the consideration plan to habitation of the fish is requested on this research area. Then, we were investigated to clarify habitat factor of the fish in the paddy field area in this research. As a result, early flow velocity into the canal and the head between the paddy field and the ditch was a negative factor for the life of the fish in irrigation period. On the other hand, a high water temperature into the canal was a positive factor for them in non-irrigation period.
