Stage 13 takes place in the district lord's palace. Your only objective here is to find the lord's throne room and confront him. Once you discover where he is hiding himself, he will be for forgiveness and promise to mend his ways. But before you can find the room, you'll have to navigate through a large number of palace sections. The entire palace guard will be on high alert, including shuriken throwing ninjas, and bomb throwing guards. Some doors can be entered to find shops and other amusements, but you'll have to investigate each door in order to find which ones you can enter. The underground passages don't provide much in the way of useful shortcuts, and the dungeon of this level is entirely optional. Stay focused on your goal, and help the needy villagers of Edo!
Dungeon entrance: 1000. This is the final dungeon of the entire game, and naturally it is the biggest. However, there's one difference with this dungeon: You don't need to do it. The only reason you should enter this dungeon is if you wish to collect a sizeable amount of money. If you feel set as far as money goes, you should not bother spending time here as there is little to gain. The choice is yours.