We look at the word "activation" as the situation that the facilities are used actively. It should be expressed quantitatively by suitable indexes. We believe, in highly utilized hospitals, the activation means not only the high rate of bed usage, but also high bed turning rate and more clinical examinations per bed. In this paper, we surveyed hospitals in Japan in comparison with ones in Taiwan ... [Show full abstract] and Korea which have shorter average length of stay for patients (ALS). We analyzed the correlations of ALS, composition of patients, management and size of them from multiple point of view. The clear correlation between ALS and the number of operations was found and the number of X-ray studies and clinical pathology exams had correlations to ALS to some degree. We also found that some hospitals in Japan which are shortening ALS for years had increasing clinical examinations and impatient revenue.