2. This character was first used in the Warring States period, but may have been created earlier.
3. Jik is a grain crop, but the specific references are different, one says it is a grain, one says it is sorghum, and one says it is non-sticky millet. Jigen is a very important grain crop in ancient times, was treated as the longest of all grains. Jigen evolved from the longest of the grains into the god of the grains, and the god of the earth together called "Jigen", and later became the country's nom de plume.