Alongside Fishing, catching Insects is one of the main things players will find themselves doing on DonDoko Island in Like a Dragon: Infinite Wealth. When Kasuga collects an Insect, it will increase its DokoPedia rank, and can be sold at the island shop for a tidy bit of profit. Some of the best DonDoko Island bugs, though, are worth a considerable amount more than just a "tidy bit" of profit.