The Japanese version of the NES port was released for the Famicom Disk System (a Japan-only add-on), and there's at least four differences from the US version:
- There's no close up when you dunk the ball into the basket.
- The US flag that shows up when the crowd goes into the stadium is replaced by three smaller Konami flags.
- The sound the ball makes when a character bounces it on the floor is much less noticeable.
- There's background music when you're out in the court playing the game!