[en] In Report 1 of this series, we described that, in the cultured cells of skin tissues, chromosomal aberrations seemingly induced by A-bomb exposure were observed in Nagasaki A-bomb survivors, especially in those proximally exposed, and some of these cells with chromosomal aberrations formed clones. Based on these findings, we suspected that the incidence of skin cancer in A-bomb survivors might have increased. In this study, we tried to clarify the incidence of skin cancer among Nagasaki A-bomb survivors using the data of a total of 66,276 A-bomb survivors recorded at the Scientific Data Center of the Atomic Bomb Disaster, Nagasaki University School of Medicine. One hundred and ten cases of skin cancer were collected from the three major hospitals in Nagasaki City and were statistically analyzed in respect to the estimated distance from the hypocenter. The results were as follows: A high correlation was observed between the incidence of skin cancer and exposure distance in the analysis of all 110 cases and of the 50 male cases (p<0.01). However, no such correlation was observed in a separate analysis of the 60 female cases. (author)