Secret Village is an unlock able area and is available within the game once obtaining a water drop stone. The secret village's location is near about directly to Thunder's Hut. After obtaining a water drop stone from Iron, the area comes automatically available to the character when travelling near to Thunder's hut, a message will appear, providing information on the Secret Village being unlocked.
Once you have unlocked the area, you will be given the notice of the area being called Secret Nova Studio Village rather than 'secret village'. By talking to one of the members of the village called Julio, you will then unlock a 'box' noticeably taking the appearance of a treasure chest which allows you to go through the main characters' history.