A slanted trunk can lean left or right. It's important the roots appear as if they are holding this tree (or trees) in place. The bonsai should never look as if it will fall over. This style is not as easy as it may look. In extremely slanted versions, it's not unusual to prop the tree with a rock when it's first styled. The rock will be removed once the roots stabilize. Slanted trees are also good for creating more advanced bonsai styles called "windswept."
