Abstract
The most popular type of matrimonial residence in the old Japan is doulocal marriage which we can know through "Diary Kagero" written at the end of 10th century by Lady Fujiwara.
Wife lives together with her mother, children, sisters and brothers. Husband visits his wife only in the night. children belong to mother's clan.
In this paper I will, first examine sone taboos in the doulocal marriage; for example that father and sons can not live together in the same house, while father and daughter can live together. I should suppose that the relation between mother and children is much stabler than the relation between father and children.
Second, I would suggest the doulocal or matrilocal marriage in a system to exchange men between matrilineal clans.
Third, I would also consider when and why doulocal marriage changes into neolocal or patrilocal marriage.
