From 2007 to March 2022, Chairman of Department of Gynecologic Oncology, Saitama Medical University International Medical Center.  Since April 2022 visiting professor of SMUIMC and specially appointed professor of International University of Health and Welfare. His main interest is surgery and chemotherapy for various gynecological malignancies and a clinical trial. PI of NRG Oncology/GOG Japan since 2007, Founding member and President of the Gynecologic Oncology Trial and Investigation Consortium (GOTIC) since 2009. Chair of GCIG from 2018 to 2020. President of IGCS since 2022.