Remove the husk on each corn and rinse under water. Pat dry. Warm the olive oil on the stove-top cast iron in medium heat.
Fit as many corn as you can on your cast iron. Rotate the corn once every few minutes to grill the corn evenly until all sides are toasted. This may take about 10 minutes.
Once the corn is grilled evenly, remove from heat and spread a thin layer of butter over the corn. Now spread a layer of miso soup across one side of the corn. Finally dress the corn with OKAZU to taste, and sprinkle a Furikake or salt. Serve!