Japan qualified two archers based on its performance at the 2017 World Archery Youth Championships.

[1][2] [3] a Cross Country Japan qualified two players based on the Badminton Junior World Rankings.

[11] Japan qualified three athlete based on the rankings in the Buenos Aires 2018 Olympic Standings.

[13] Japan qualified one boat based on its performance at the 2018 Asian Youth Olympic Games Qualification Regatta.

They also qualified a female climber based on its performance at the 2017 Asian Youth Sport Climbing Championships.