Backstroke start by Junya Koga

(13)

CW's Junya Koga breaks US Open Rec 24.36 50 Backstroke

(35)

Junia Koga Start

(14)

Japan Open 2015: Men's 50 m Back (Junya Koga 24.73)

(1:23)

Japanese World Champion Junya Koga explains training at Club Wolverine

(1:20)

2009 FINA World Championships-Men's 50m Backstroke Medal Ceremony

(4:41)

Swimisodes - Backstroke Swim Drill - 6 Kick Switch

(4:26)

Swimisodes - Backstroke with Junya Koga - Head Position

(5:19)

CW Elite 100 Backstroke Showdown

(3:42)

Swimisodes - One Arm Backstroke

(2:56)

Mare Nostrum Barcelona final 100ry men Junya Koga B3 Ryosuke Irie B4

(1:5)

Junya Koga Top Arm Breakout Up Close

(32)

Junya Koga hopes to break 50 Back WR in 2nd time trial

(57)

Pan Pacific Championships 50M Costas Junya Koga em 1º Ashhley Delaney em 2º Nick Thoman em 3º Participaçao do mais novo Velocista de costa Glauber Silva colocando G Guido no bolso

(3:40)

2009 WORLDS NBC M 100 back F (Koga, Grevers start above and under)

(11)

Champion du monde du 100m dos en 2009, Junya Koga contrôlé positif

(1:52)

World Record - Daiya Seto | 200m Butterfly | #FINAHangzhou2018

(3:4)

Junya koga has sights set on 50 back WR at US Nationals

(1:51)

Junya Koga, Club Wolverine (after 100 back final at U.S. Nationals)

(2:46)

Swimisodes - Backstroke Kick

(2:55)