Nichiren Daishonin states in “On Remonstrating with Hachiman”:
India was called the land of the moon. It is a name, indicating the advent of Shakyamuni Buddha. Fuso is the name for ancient Japan, the land of the rising sun. Indeed, how could a sage not appear in this land? The moon travels from west to east, which is a sign of the Buddhism that originated in India spreading to the East. The sun rises in the east, which is an auspicious sign of the Buddhism that emerged in Japan gradually returning to India. Moonlight, when compared to the sun, is not as brilliant. Shakyamuni Buddha expounded the true teaching for only eight years. Sunlight is brighter than the light of the moon, and this signifies that the Buddhist teaching [of Nichiren Daishonin] in Japan shall illuminate the infinite darkness of the fifth Five-hundred-year Period.