We were lost in The Grand Maze Palladium (巨大迷路パラディアム, Kyodai Meiro Palladium) but manage to get out in 50 minutes.
This challenging labyrinth is great for kids and adults, a great way to test your perseverance. To complete this maze you must stamp a card at each of the four checkpoint towers. Cold drinks are awarded to those that finish in less than 20 minutes. Our family finished the maze in 50 minutes. But Erica was given a free drink, maybe they consider all kids to be awarded.
AloJapan.com