Instructions
Play through the game until you have completed the Trial Road stages in the Shaman Village in the West Sea. The Shaman Village is on the eastern side of the northwestern continent.
Board your ship and travel to the continent to the south. Look for a river on the northeastern side of the continent and navigate into it.
Follow the river's path to the southwest to arrive at the Atteka Inlet. Dock your ship and disembark.
Climb down the ladder near the dock and walk across the shore. Head west until you find a slope leading north. Follow its path until you reach a large crater.
Enter Contigo, the village adjacent to the large crater. Explore the town and buy any items or equipment you need. Stock up on healing items because Jupiter Lighthouse is one of the longest sections of the game. When you are finished exploring Contigo, leave the village through the north exit to find the Jupiter Lighthouse entrance.