If a division has 10 or more teams, JSYFL may divide it into two conferences: National and American.
When splitting conferences, the bylaws list factors such as:
- Whether it’s a first-year team at that grade level
- Returning team record from the previous season
- If it’s a second team from a park and how many returning players are on the roster
Playoff rankings are based on a team’s record within its conference; cross-conference games are treated as non-conference for seeding.