Koyo Trunk Splitter

This tool is designed to split thick branches or trunks to facilitate extreme bending or to create shari, which is the aesthetic effect of deadwood on a living tree. By splitting the wood, you reduce the tension within the branch, allowing it to be shaped into more dramatic positions without snapping.

Stainless steel is highly resistant to rust and corrosion, which is a significant advantage when working with moist soil or sap. While it is more durable than carbon steel, you should still wipe the blades clean after every use and apply a light coat of camellia oil to keep the pivot moving smoothly.

While it is a 'Masters Grade' tool, it is suitable for any bonsai enthusiast ready to perform advanced structural styling. However, because trunk splitting is an aggressive technique that can stress a tree, we recommend practicing on scrap wood or less valuable specimens before applying it to a prized bonsai.

The 200mm length provides a good balance of leverage and control for medium-sized branches. For very thick, established trunks, you may find that the tool requires significant hand strength, but it is perfectly sized for the detailed work required in professional bonsai refinement.

Yes, the splitter is specifically engineered to divide a trunk section cleanly. This technique is often used to transform a single-trunk tree into a multi-trunk or raft-style composition by carefully splitting the base.