The Split Trunk "sabamiki" style of bonsai trees is a technique that creates a hollow or a crack in the trunk, simulating the effect of a lightning strike or natural decay. This style enhances the appearance of age and character in the bonsai, and can be applied to both deciduous and evergreen species. To create a sabamiki bonsai, the bark is removed from a section of the trunk and then the wood is carved out with a drill or a knife, leaving some live tissue intact to transport nutrients. The depth and width of the split should vary along the trunk, creating a natural taper. The split should also be treated with lime sulfur or wood hardener to prevent rotting and insect damage.