The incidence of postoperative hepatic metastasis within five years was statistically analyzed in 144 patients undergone a curative resection for advanced colorectal cancer in our department. Liver metastasis occurred in 23 (15.9%) out of the 144 patients, and these 23 patients were analyzed to identify values for clinicopathologic factors and their subcategories. Significantly higher frequencies were noted in patients demonstrating the following factors: (1) preoperative serum level of CEA antigen>30ng/ml (p<0.01); (2) tumor size>60mm in the great dimension (p<0.05); (3) undifferentiated histological type (p<0.01); (4) depth of tumor invasion (p<0.05); (5) postive lymph node metastases (p<0.01); (6) positive lymphatic invasion (p<0.01); (7) positive venous invasion (p<0.01). These factors were analyzed by Hayashi's quantification theory, and high risk group for liver metastasis after curative resection for colorectal cancer was identified by guantifying these factors. Of the 23 patients, 20 (87%) patients were identified to belong to high risk group. Since this guantification of factors is made on limited factors which can be easily obtained in many hospitals, it contributes to identify the high risk patients. In these high risk groups, careful postoperative management would be mandatory, thereby improving prognosis of the patients with colorectal carcinoma.