Unlike typical watermelons, which are grafted onto rootstocks like gourd, the Gokumi Suika is cultivated by grafting watermelon onto watermelon rootstock. This method is used to achieve the purest flavor and texture of the fruit. However, it is more labor-intensive, as this variety is susceptible to certain diseases and cannot be grown in the same spot repeatedly. The effort put into growing these watermelons ensures a taste that lives up to their name, "the ultimate fruit."