Kodokan Institute - Samejima sensei explained Rei (Samejima Motonari sensei, judo 8. dan). Correct bowing technique from Samejima sensei of the Kodokan - source from FCB Juan Manuel Chavez (Budokai)
https://www.youtube.com/watch?v=0Xf4mrVcMWU
https://www.youtube.com/watch?v=0Xf4mrVcMWU