Japan must lay everything on the line against Qatar in the Asian Cup final, head coach Hajime Moriyasu said Thursday, on the eve of the tournament decider.

The Samurai Blue are aiming to extend their record number of continental titles to five at Zayed Sports City Stadium on Friday, but they must overcome a high-octane Qatar side whose victims include one of the tournament favorites.

Prior to thrashing hosts the United Arab Emirates 4-0 in the semifinals, the Maroons, coached by Spaniard Felix Sanchez, shocked heavyweight South Korea with a 1-0 upset in the round of eight.