He plans to buy something else. He wants money. He will sell the crop to the highest bidder, but agricultural crops being what they are, a uniform price will confront all soybean farmers, adjusted for transportation costs and other minor differences. In the bidding war, the Japanese importers of soybeans usually win. They buy the lion's share of the crop.
Soybean oil is used for many products.
Fido and kitty get most of whatever remains. Although I find it difficult to imagine, I suppose the rest goes into soybean burgers. Similarly, the goal of Mr. Uda is not to drive a fleet of Toyotas. He plans to buy something else. He wants money.