Tohru Okanishi graduated from Toyama Medical and Pharmaceutical University in 2001. In 2001, Tohru Okanishi worked as a Clinical Fellow at Nagoya City University Hospital and Seirei Mikatahara General Hospital, a Clinical Fellow at Tottori University Hospital in 2006, a Staff Physician at Seirei Hamamatsu General Hospital in 2008, a Research Fellow at the Hospital for Sick Children, Canada, a Manager at Seirei Hamamatsu General Hospital in 2013 and as an Associate Professor at Tottori University Hospital in 2020.