"Ni" and "e" can both indicate direction of motion, literally meaning "to" or "at" in English. However, as particles in Japanese directly modify the preceding noun, some Japanese language courses call this the "goal of movement" usage because it marks the goal of the movement. For example, in the sentence ("Watashi wa uchi ni kaerimasu" or "I'm going back home") the goal of the movement is home ("uchi ni"). In this sense, "e" is perhaps closer to English "towards" in terms of use (see example below). As long as "ni" is used directionally, it is possible to substitute "e" in its place. "Ni" used in other senses cannot be replaced by "e":