Dondoko Island is a significant part of Like A Dragon: Infinite Wealth's appeal, but how and when the experience can be accessed in-game isn't immediately obvious. The Like a Dragon series, formerly published as Yakuza in the west, has long been known for featuring memorable and unique side content and mini-games to accompany its more dramatic main stories. Infinite Wealth promises an even longer and more robust experience than any of the past games have ever delivered, and Dondoko Island might be the selling point that jumps out the most.
https://screenrant.com/like-a-dragon-infinite-wealth-unlock-dondoko-island/