Final answer:
After World War II, changes made by the United States affected the agricultural system in Japan by allowing farmers to buy the land they farmed.
Step-by-step explanation:
The correct answer is allowing farmers to buy the land they farmed. After World War II, the United States implemented land reform in Japan which allowed farmers to purchase the land they cultivated. This change aimed to promote individual ownership and increase agricultural productivity. By giving farmers ownership of the land, it provided them with a sense of security and incentive to invest in their farms.
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