The term "Sankan" means a bonsai style that has three trunks emerging from the same base or root system. The word "Sankan" comes from the Japanese word for three, "san". This style is often used for conifers, such as pines, but can also be applied to other types of trees. The three trunks should have different heights and thicknesses, and create a balanced and harmonious composition. The main trunk should be the thickest and tallest, while the secondary trunk should be thinner and shorter, and the tertiary trunk should be the thinnest and shortest. The branches should be arranged in a way that does not hide the trunks from the front view of the bonsai.