Nuvation Bio Inc. (NYSE: NUVB), a global oncology company focused on tackling some of the toughest challenges in cancer treatment, today announced the company has amended its existing exclusive license agreement for safusidenib with Daiichi Sankyo (TSE :4568) to include Japan rights, effectively securing exclusive global development and commercialization rights of the investigational medicine. The agreement, as amended, enables Nuvation Bio to expand its ongoing pivotal SIGMA study of safusidenib into Japan, and provides rights to all previously generated and future data to support further publication of safusidenib results in IDH1-mutant glioma.