抄録
The purpose of this study is to clarify through survival analysis which factors particular to a certain area and the market structure affect the sustainability of designated vegetable producing areas. The main points discussed in this paper include:
1. Early designated areas are apt to show higher rate of cancellation. The average length as the designated areas that have been cancelled is 13.6 years. This confirms broadly accepted understanding, but has not yet been fully verified so far.
2. The increase in designated areas in northern Japan in recent years is considered to be a result of a lowering in the entry barriers due to the decreasing number of competitors in other parts of the country.
3. The survival analysis showed a decrease in sustainability for areas used for out door production of heavy vegetables, such as radish and cabbage.
4. In a cancelled area of the mountainous Chugoku region we found a growing shift from the out door production of heavy vegetables to the production of lighter and house type vegetables.
5. The gradual increase in cancelled areas which have shifted their type of production, suggests the need to review the present system for designating vegetable production areas.
