Dr. Kobayashi delivered primary rat hepatocytes form Tokyo Women’s Medical University to Prof. Okajima’s laboratory, Hokkaido University on February 5, 2015. Drs. Akiyama and Kobayashi visited Prof. Okajima’s laboratory on February 6, 2015 to measure the elastic property of hepatocyes and their coculture with endothelial cells, and discuss the correlation between physiological function and elastic properties of hepatocytes.