Here's why:
* Kennings are figurative phrases that use poetic language to describe a person, place, or thing. They often use metaphors, similes, or compound words.
* "Land of the Rising Sun" is a kenning for Japan. It evokes the image of the sun rising over the eastern horizon, which is where Japan is located.
Here are some other examples of kennings:
* "The whale-road" for the sea
* "The breaker of oaths" for a traitor
* "The ring-giver" for a king
* "The battle-sweat" for blood
Kennings are particularly common in Old Norse and Old English poetry, but they can be found in other languages and literary traditions as well.