1. Sale area of owner-farmer's agricultural land for cultivation has steeply decreased since about 1975, remarkably in Hokkaido. And the price of agricultural land for cultivation has been continuousely rising much more than the rate of rise in consumer price.
2. Purchase of agricultural land for cultivation is generally unprofitable because of high price of it. But, the rate of it has differences by agricultural region and size of planted area.
There is still some possibility in purchase of cultivated land in theory of manegement, but in reality sale and purchase area is limited because of high price.
3. Since 1980 in Prefectures (excluding Hokkaido), lease area has been more than sale area. In Hokkaido, sale area has been more than lease area, but the share of lease area has been increasing steadily.
4. Farm households expanded their area of cultivated land "by rent" more than "by purchase" since 1972 in Prefectures, and since 1979 in Hokkaido. Especially, farm households with large slze of cultrvated land have expanded their area of cultivated land mainly "by rent".
5. The ratio (net earnings for paddy field in rice production to rent of paddy field) of large size farm households are larger than the one of small size farm households. And the ratio means the payability by rent for cultivation.
6. The economy of farm households earned main income from other jobs is relatively wealthy, and the position of agricultural income in total farm households income is very low in recent years. And besides the agricultural productivities are low.
Therefore, for farm households earned main income from other jobs, lease of agricultural land for cultivation is not unprofitable in the aspects of economies of farm households and land utilization. Yet, lease of agricultural land for cultrvation does not increase favorably.
It is necessary to transfer the right for utilization of agricultural land for cultivation from farm households earned main income from other jobs to full-time farm households.
7. The systematic village farming includirig farm households earned main income from other jobs, is one of very important means to improve the structure of farming which depends on mainly size of land area, in addrtion to upbringing viable farms by means of lease of agricultural land for cultivation.
But, unless viable farm is brought up in the systematic farming, which come to a deadlock early or late.