Medalists
, style="text-align:left; width:78%; vertical-align:top;", , style="text-align:left; width:22%; vertical-align:top;",Archery
Japan qualified a two archers from its performance at the 2013 World Archery Youth Championships. ;Individual ;TeamAthletics
Japan qualified 13 athletes. Qualification Legend: Q=Final A (medal); qB=Final B (non-medal); qC=Final C (non-medal); qD=Final D (non-medal); qE=Final E (non-medal) ;Boys ;Track & road events ;Field Events ;Girls ;Track & road events ;Field eventsBadminton
Japan qualified two athletes based on the 2 May 2014 BWF Junior World Rankings. ;Singles ;DoublesBoxing
Japan qualified three boxers based on its performance at the 2014 AIBA Youth World Championships ;BoysCanoeing
Japan qualified one boat based on its performance at the 2013 World Junior Canoe Sprint and Slalom Championships. ;GirlsCycling
Japan qualified a boys' and girls' team based on its ranking issued by the UCI. ;Team ;Mixed RelayEquestrian
Japan qualified a rider.Fencing
Japan qualified three athletes based on its performance at the 2014 FIE Cadet World Championships. ;Girls ;Mixed TeamField hockey
Japan qualified a girls' team based on its performance at the 2013 Under 16 Asian Cup.Girls' tournament
;Roster *Golf
Japan qualified one team of two athletes based on the 8 June 2014 IGF Combined World Amateur Golf Rankings. ;Individual ;TeamGymnastics
Artistic Gymnastics
Japan qualified two athletes based on its performance at the 2014 Asian Artistic Gymnastics Championships. ;Boys ;GirlsRhythmic Gymnastics
Japan qualified one athlete based on its performance at the 2014 Asian Rhythmic Championships. ;IndividualTrampoline
Japan qualified one athlete based on its performance at the 2014 Asian Trampoline Championships.Judo
Japan qualified two athletes based on its performance at the 2013 Cadet World Judo Championships. ;Individual ;TeamRowing
Japan qualified one boat based on its performance at the Asian Qualification Regatta. Qualification Legend: FA=Final A (medal); FB=Final B (non-medal); FC=Final C (non-medal); FD=Final D (non-medal); SA/B=Semifinals A/B; SC/D=Semifinals C/D; R=RepechageRugby sevens
Japan qualified a boys' team based on its performance at theBoys' tournament
;Roster * Ryusuke Funahashi * Shimin Kohara * Toshiki Kuwayama * Doga Maeda * Eiya Miyazaki * Kosuke Naka *Sailing
Japan qualified two boats based on its performance at the Techno 293 Asian Continental Qualifiers.Shooting
Japan was given a wild card to compete. ;Individual ;TeamSwimming
Japan qualified eight swimmers. ;Boys ;Girls ;MixedTable Tennis
Japan qualified a girl based on its performance at the 2014 World Qualification Event and a boy based on the Under-18 World Rankings. ;Singles ;Team Qualification Legend: Q=Main Bracket (medal); qB=Consolation Bracket (non-medal)Tennis
Japan qualified two athletes based on the 9 June 2014 ITF World Junior Rankings. ;Singles ;DoublesTriathlon
Japan qualified two athletes based on its performance at the 2014 Asian Youth Olympic Games Qualifier. ;Individual ;RelayWrestling
Japan qualified two athletes based on its performance at the 2014 Asian Cadet Championships. ;Boys ;GirlsReferences
{{NOCin2014SummerYouthOlympics 2014 in Japanese sport Nations at the 2014 Summer Youth Olympics Japan at the Youth Olympics