The Japanese term "Netsuranari" means sinuous-root style. It is a style that resembles the Yose-Ue (forest) style, but all the trunks are connected by a single root system. It consists of a primary tree with multiple stems, each of which has emerged from various points of the sprawling roots and grown into a tree. This style mimics a natural phenomenon that occurs when a tree topples onto its side due to erosion or another natural force. Netsuranari bonsai are very challenging and interesting to create, as they require a balance of design and technique.
There are only a few species that will grow into a ''netsuranari'' tree. The most popular are ''yamamomiji'' (Matsumurae Maple), ''goyomatsu'' (Japanese White Pine), ''tosho'' (Needle Juniper), and ''sugi'' (Japanese Cedar).