Which explains the reason for the farm crisis following world war i?

At the end of the world war I Agriculture and rural areas suffered a fall in crop prices, which reached approximately 60%. Given the fall in demand, the areas dependent on the primary sector industries, with few alternative sources of employment, were the most affected.

In the course of the war, various nations not involved in the conflict such as the United States and Japan seized some international markets, traditionally dominated by Europeans, who at that time focused their industrial efforts on military production. In the agricultural sector, the external demand for food products from the participating countries grew during the war, which stimulated the agricultural production of the neutral countries, which at the end of the war and returned to the previous situation saw how they had an excessive supply of agricultural products, which forced a reduction in prices in this sector, which suffered large losses.

cultural/diplomatic relations. most medieval japanese   culture has chinese origins. writing, architecture etc.