Station residents from Marine Corps Air Station Iwakuni learn about lotus roots at Yamaguchi’s Agricultural, Forestry, Fisheries, and? Stockbreeding in Iwakuni City, Japan, Feb. 10, 2016. Iwakuni is a lotus root producer, exporting the product worldwide. With the roots comes various nutritional and health benefits such as vitamin C; dietary fiber; iron; potassium; calcium; prevention of colds, cancer and other diseases; and lowering high blood pressure. - Station residents from Marine Corps Air Station Iwakuni learn about lotus roots at Yamaguchi’s Agricultural, Forestry, Fisheries, and? Stockbreeding in Iwakuni City, Japan, Feb. 10, 2016. Iwakuni is a lotus root producer, exporting the product worldwide. With the roots comes various nutritional and health benefits such as vitamin C; dietary fiber; iron; potassium; calcium; prevention of colds, cancer and other diseases; and lowering high blood pressure.