The was the 31st season of the main competition for under-18 teams in Japan and the 10th after rebranding the competition to the current "Premier League" format.
Aomori Yamada High School won the Premier League East, and Nagoya Grampus won the Premier League West. The teams' meeting in the final resulted with Aomori Yamada winning the competition for the second time.
As usual, the 16 top-ranked teams of the nine Prince League divisions entered the play-offs. They were split into four blocks, with each block winner (highlighted in bold) qualifying for the 2021 Premier League, as the 2020 edition was not held due to problems related to the COVID-19 outbreak.