Utu is the god of the sun and of justice, and the implementation of law. He is usually depicted as wearing a horned helmet and carrying a saw-edged weapon not unlike a pruning saw, which it is thought he used to cut through the side of a mountain from which he emerges, symbolising the dawn. He may also carry a mace and stand with one foot on the mountain.
He rises in "the mountains of the east" and sets in the "mountains of the west".
Sumerian Utu corresponds to Akkadian Shamash.
Marduk is spelled AMAR.UTU in Sumerian, literally, "the calf of Utu" or "the young bull of the Sun".