Our knowledge of Japanese sexuality from the tenth to the twelfth centuries is limited chiefly to the imperial court. Sexuality was constructed textually through key concepts from Chinese culture and the globally unprecedented rise of writing by women in Japanese. Emperors, princes, and high-ranking aristocratic men were often polygynous and marriage was not controlled by either law or religion. Virginity was rarely valued and there was no primogeniture. ‘Divorce’ and ‘remarriage’ were frequent. Incest taboos were limited, applying to full siblings and parents and their biological offspring. While most aristocratic women were to be seen only by their fathers, husbands, or sons among men, women and men serving at court might have multiple sexual partners and social hierarchy played a dominant role in men’s access to women’s bodies; legal prosecutions for rape were nil. There is evidence of pederasty both at court and in temple complexes by the late tenth and the early eleventh centuries, respectively. Non-pederastic homosexuality seems to have had a sudden efflorescence at the end of the period. Definitive evidence for female homosexuality does not appear until the thirteenth century, but probably existed earlier.