Manchester United flop Alexis Sanchez netted his first goal in five months as defending champions Chile got their Copa America campaign off to a dream start against Japan.
Guest nation Japan were humbled by the more experienced opposition, that holds the core of the squad which lifted consecutive Copa titles.
The Asian side, clearly building for the future selected a squad with 20 players of the 23, under the age of 25 and afforded Real Madrid-bound wonderkid Take Kubo a start.
And there were no surprises as midfielder Erick Pulgar opened the scoring with a bullet header five minutes before the break, despite a bright opening half for the Hajime Moriyasu's side.
Former QPR striker Eduardo Vargas grabbed a second-half brace which marked a record of scoring at a fourth major international tournament for the nomadic 29-year-old.
This between an 83rd minute diving header from out-of-form Sanchez, who also provided an assist for Vargas' second strike.
The victory moved La Roja to the top of Group C along with Uruguay, who opened with a 4-0 win over Ecuador on Sunday.