2004.04.01 - 2005.05.31, Graduate School of Medicine, Research Assistant
2005.06.01 - 2008.05.31, Division of Internal Medicine, Graduate School of Medicine, Associate Professor
2008.06.01 - 2011.03.31, Division of Internal Medicine, Graduate School of Medicine, Associate Professor
2011.04.01 - , Division of Medicine, Graduate School of Medicine, Associate Professor