During the training scene, Bruce Wayne is revealed to be a black belt while Dick Grayson is only a green belt.
This episode and Zatanna (1993) are the only two episodes to show Bruce Wayne during the period of his life when he was training to be Batman. A reference to this episode was made when Bruce rebuffed Zatanna's advances saying he was getting ready to travel to Japan in order to further his studies.
Included as a special feature from the DC Comics Vault on the Blu-ray release of Batman: Soul of the Dragon (2021).
Kyodai Ken's name means "giant sword."
At one point Summer Gleason refers to Bruce Wayne as "The Bruce". This could be a reference to Donald Trump, who is often referred to in the tabloids as "The Donald".