Sako 【左子】3 The Japanese surnames etymology dictionary.
① Korea type . Thing . Korea Republic of Korea Gyeonggi Province Ushikawa Susumu's father's ancestor told that he used "Xu" because he was standing in the southern castle of the same place when he was pursued the throne with the king of the old Korea . Korea sound is SO. Oosaka-fu Oosaka-shi Distributed in Tatsukichi, Ikeno ku.
② Sina series . Originated from the People's Republic of China near Lingcheng County, Linyi, Shandong Province (formerly Xu (Shu)). Shinami is a shoe. Kanagawa-ken Yokohama-shi Distributed in Yamashita-cho, Naka-ku.