The Daimyo gained power because they ran the government and distributed the rice crop.
The Daimyo of Japan:
Because they owned such large amount of land, they were effectively the rulers of Japan as they controlled activities in their areas.
They also distributed the rice crop by taxing it and selling it with proceeds used for various things in Japanese society such as building roads.
In conclusion therefore, we can say that the Daimyo gained power by running their areas of Japan and controlling rice.
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