Stages
A normal loop is three of the five combat stages. FINAL sends you to the Endless Castle. Joojutsu High is only the opening lesson.

Shibooya
City streets full of curses. Clear the block, then charge the Warp Pad.

Mt. Natagoomo
A mountain of webs and demons. Keep moving, and do not stand in the silk.

Valley's End
A waterfall valley of missing-nin, puppets, and paper cranes.

Marinefort
A fortress on the water. Marines, giants, and admirals hold the plaza.

Seiraytei
White streets and high walls. Hollows and reapers share the ground.

Endless Castle
The final arena after you choose FINAL. The rooms shift, and Moozan is waiting.
Joojutsu High
A short lesson the first time you play. It is not one of the three stages in a normal run.