The purpose of the present study was to examine intergenerational transmiss
ion of attachment between 50 Japanese mothers and their preschool-age child
ren. The mothers' present state of mind with respect to attachment was asse
ssed using the Adult Attachment Interview (AAI); their children's level of
attachment security was measured using the Attachment Q-set (AQS). The resu
lts indicated that the children of secure mothers had the highest security
scores on the AQS, while the children of unresolved mothers had the lowest
AQS scores. Moreover, secure mothers' children mere likely to interact posi
tively with their mothers as well as with strangers, and their emotion regu
lation was positively organized. In contrast, the children of unresolved mo
thers acted negatively with their mothers and with strangers, and their beh
avior was disorganized. Children of dismissing and preoccupied mothers did
not show marked differences. The present study is the first non-Western sam
ple documenting empirically the association between the AAI and the AQS. Fu
ture research should ascertain the validity of the AAI and the AQS with Jap
anese samples, and should examine the role of familial/social influences on
the development of attachment.