Like a Dragon: Infinite Wealth

To achieve a 4-star resort rating, you'll need to build up your island, clearing out each area, and attaining the required satisfaction and popularity target. To become a 4-star resort, you'll have had to have cleared out a number of areas to reach three stars, then you'll need to clear the cave and forest, as well as climbing to 28,000 satisfaction and 8,000 popularity. You've got a lot of clearing and building ahead of you!