Koki Ogawa scored a hat trick in his international debut as Japan thumped Hong Kong 5-0 in the EAFF E-1 Football Championship final round on Saturday.
The 22-year-old striker staked his claim for Olympic selection as Japan easily accounted for Hong Kong, which lost 2-0 to South Korea on Wednesday.
With only domestic players at his disposal, Japan manager Hajime Moriyasu capped a number of candidates for next year's Tokyo Games, where the men's tournament will be contested by under-23 teams including a limited number of overage players.