This study analyzed the reality of the large-scale paddy farming management in Hokkaido which develops under the price of rice falling and a policy change. The profitability of the rice falls under the price of rice falling and a policy change at present. Therefore the planted acreage of the rice decreases at a large-scale rice paddy area in Hokkaido. Correspondence of large-scale paddy farming management is wrestling for low cost and land use advance, Management is being improved by Incorporated Cooperative farm management by more than one farmer, Transplanting Rice and the thing in which wheat and soybeans are planted. But it's the present agricultural policy that large-scale farm management and an agricultural production corporation（Cooperative farm management）are being supported economically. When these economical conditions were lost, it's a crisis for the regional agriculture which has trouble with successor's securement. Rice paddy agriculture in Hokkaido shows that a structural change was developed by retire of an old farmer for an agricultural census in 2015. Regional agriculture is supported with large-scale farm management and an agricultural production corporation（Cooperative farm management）．It's future's problem to make the mechanism to succeed to the wealth of the regional agriculture to the next generation.
This paper deals with a case study of community-based group farming in the early 2010s. Japanʼs agricultural policy was revised in 2007. The policy aimed to increase efficiency of paddy cultivation by expanding paddy field size. Under the policy, the number of community-based farming groups involved in paddy cultivation increased rapidly in the Tohoku region. However, most of the community-based farming groups in the Tohoku region did not have an efficient cultivation system at that time because the groups were formed in order to abide by the policy. This study aimed to clarify how community-based farming groups in the Tohoku region have changed. First, this study showed that farmers worked as a team by sharing agricultural machinery. Second, the conditions for the development of community-based farming groups in paddy cultivation were analyzed. The research was conducted in Akita Prefecture. The clarification of this paper is as follows:（1）Reorganization of farming groups as a corporation created an opportunity to begin working together.（2）Members of farming groups still worked on the field and earned income from farming.（3）The income of main operators was lower than that of other industrial sectors.（4）Farming groups accumulated farmland in their areas.
The purpose of this study was to investigate the change of the community-based farms （CBFs）in Saga Prefecture, which experienced significant changes of agricultural structure. At the time of changes, there were“quantitative reduction”both in the CBFs itself and in the member of CBFs. Alongside of this, corporatization of CBFs were also in progress. Though it was limited to a partly association in a face of management of CBF.