Applications for the 2020 Hangai Prize have been closed. Because the Covid-19 pandemic has required the postponement of the IASS 2020 Symposium, the applications already received are still being evaluated. Winners will be announced in late autumn, the winning papers will be published in the December 2020 issue of the Journal of the IASS, and the winning authors will present their contributions in a conferral ceremony at the IASS 2020/21 Symposium in August, 2021.