Shred Daikon radish and carrot into a bowl and set aside.
To make the batter, mix flour, water, and 1 teaspoon salt in a bowl until all incorporated
In a heated non-stick pan, cook shredded Daikon radish and carrot until the daikon turns translucent and all water has evaporated over low-med heat. (See Notes)
Turn heat to low, add in the batter, then continue to cook while stirring constantly until the mixture thickens. All Daikon radish should be covered with batter. Season with salt and pepper.
Then, transfer the mixture into a 9X5 non-stick loaf pan and cover it with foil, if needed.
Place the loaf pan on the inner steamer rack and steam over high heat for about 30 minutes. The cake may look sticky at first.
Let the cake cool down completely/refrigerate overnight before cutting it. This savory cake can be served as-is at this point.