For over three hundred years during the Heian period (794-1185), execution was customarily abolished in favor of banishment. During the same period, exile emerged widely as a concern within literature and legend, in poetry and diaries, and in the cultic imagination, as expressed in oracles and revelations. While exile was thus one sanction available to the state, it was also something more: a powerful trope through which members of court society imagined the banishment of gods and heavenly beings, of legendary and literary characters, and of historical figures, some transformed into...