A thousand years ago, a young Japanese girl embarked on a journey from the wild East Country to the capital. She began a diary that she would continue to write for the next forty years and compile later in life, bringing lasting prestige to her family.

Some aspects of the author's life and text seem curiously modern. She married at age thirty-three and identified herself as a reader and writer more than as a wife and mother. Enthralled by romantic fiction, she wrote extensively about the disillusioning blows that reality can deal to fantasy. The Sarashina Diary is a portrait of the...