Homer's jersey number - 5
Watt's jersey number - 81
The scenes that are played on the NASA Aliens' computer are scenes used during the opening theme.
American Football Clinic Trivia Q & A of the episode:
Q: What is the difference between a return touchdown and a normal touchdown?
A: A return touchdown is when you catch a kicked ball and score a touchdown. It's a one-of-a-kind big play in American Football! YA-HA!
The name of Apollo's pet cat is Hirari, which is the equivalence of the name Hillary.
The name of the NASA Aliens' coach is Apollo.
Since Panther was taken off the team, he was not allowed to go with the team to Japan. He got the money to go from his grandmother.
Panther was about to punch Apollo, but to keep Panther out of even deeper trouble, Homer punches Panther before he could do so.
The name of the coach is Apollo. It is an allusion to NASA's Moon landing program.
"Dogeza" is a form of bowing while on your hands and knees. Panther confused it in the sense that you had to be upside-down while holding onto a ladder with one hand. The picture that Watt had seems to be from a firefighters' agility contest from Japan's Edo period.