I. 工業地域化以前の調査地域の水産業 (1) この地区のもつとも主要な産業であった. (2) 大森・糀谷地区は海苔業が,羽田地区は漁携業が主であつた.(3) 大森地区では経営規模が比較的大きく,糀谷・羽田地区では小さい.
II. 工業地域化と水産業 (1) 工業地域化は,水産業の経営規模がより零細な糀谷・羽田地区の方でより早く進行し,漁民社会の変化もより深刻であつた. (2) 戦争のため,漁民社会の変化は一時中断した.
III. 最近の職業別人口構成 (1) 戦後の急速な工業の復旧により,この地区は戦争中以上に密集した中小工業地域になつた. (2) その過程で再び水産業の衰亡と漁民社会の変貌が急速に進んでいる. (3) やはり糀谷・羽田地区の方が大森地区より変化がはげしい.
IV. 地元出身者の職業別人口構成 (1) 地元出身者だけをとると,なお水産業人口の比率がもつとも高い. (2) この地区の変貌はより多く移住者の流入に負つている.
V. 水産業の構造 (1) この地区とくに大森地区は,今なお全国最大の海苔産地である. (2) 漁民社会の底辺には採貝業者がいる. (3) 海苔業者の問でも階層分化が進んでいる. (4) その頂点には少数の大規模経営者がいる.彼等は大土地所有者でもある. (5) 上層海苔業者は,丁場の中心であり,海苔問屋と倍い結びつきを持つて,漁民社会の主導権をにぎつている.
VI. 漁民社会と移住者 (1) 産業政策と都市計画により,この地区の永産業と漁民社会は決定的に崩壊しつつある. (2) 上層海苔業者は,地主化あるいは家主化の傾向が強い. (3) 下層漁民のプロレタリアート化が進んでいる. (4) 上層海苔業者・問屋・工場主は地域社会の主導権をにぎり続けようとしている. (5) しかし,下層漁民と工場労働者との間,とくに若い世代の間では,新らしい人間関係が生れている.

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Izumo Plain, situated on the coast of the Japan Sea, is the largest alluvial plain in the San-in District. In prewar times, dispersed settlement and a unique farming method under the large land-owner system made great features of the plain.
In the end of last century, a farming method which required extremely hard labour was established on this plain. This method consisted in digging wet field deep, then heaping up the earth to make high ridges, upon which clovers (medicago denticulta) were planted for making green manure. Though it was hard for the farmers, this farming method was profitable on the part of the land-owners, so they had little intention to improve theirland. Their chief concern was to protect their land from frequent floods of the Hii River, and the energy of the farmers was directed to the river conservation works instead of land improvement. This is why this district has been so backward with respect to land-improvement.
The conservation works of the Hii River were done from 1922 to 1944. After World War II, the first. attempt to improve the land was made on the lowest part of the plain on the coast of the lake. Encouraged by the successof this attempt coupled by the influence of the farm-land reform, farmers came to realize the importance of improving their land. So farm-land over 3, 200 ha was improved during the period from 1952 to 1957. First, dikes were formed along the lake coast, which prevented the salty lake water from coming into the fields. Then the water within was pumped away, and paddy fields were partitioned into 10 or 20 a.
After the improvement, barley for beer-making is planted in some parts in place of clover which was commonly seen before the improvement, but this is not so widely known here. Orchards have shown a remarkable increase, but, when compared to the whole farm-land, they take only small part. Dairy in the wet fields, which is now being encouraged as a new type of agriculture, is experimentally adopted by a small number of farmers. Fodder culture is also restricted to only a small portion. In short, the rotation of rice and foddy culture does not go well. The commonest type of the utilization is single rice culture. Next to this, two-crop farming and horticulture are attempted in some place. The last one is dairy. These types, except the first one, are still on the experimental stage. This is caused by 1) farmers' inability to get accustomed to the new farming techniques (especially in raising milking cow), 2) lack of labourers, and 3) instability of the prices. For these reasons any effective utilization has not been observed. yet, though wet fields were changed into dry ones, except the only merit that the extremely hard labour of the farmers has been much reduced.
For the future development of the land utilization, the following measures are to be desired.
1) The fields which still remain wet must be changed into dry ones by underground drainage.
2) For the ample supply of water and prevention of floods caused by the accumulation of sand, radical conservation works of the Hii must be performed.
3) A firm sale cooperative system directly connected with Osaka Metropolitan Market must be establi-shed. Both the agricultural cooperativeassociations and cooperative management of agriculture play agreat part for the realization of this purpose.

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