Kikyaku
Kikyaku are reclining rocks that are placed in a Zen garden to represent the earth. This stone is often known as a root stone and is placed in the foreground to bring harmony to the garden.
Shigyo
Shigyo represents the fire element. When placed in a Zen garden, Shigyo stones are called branching and peeing stones. Shigyo stones arch and branch out, the way a fire looks. They are placed next to other shapes in a Zen garden.
Shintai
Shintai stones are horizontal and flat. Shintai stones represent water in a Zen garden, and also represent the mind and the body. These stones harmonize rock groupings.
Taido
Taido represents wood. These stones are vertical and tall. The stones act as high trees in the garden and are also known as body stones. Taido stones are put into the back of other rock groupings, much like a forest is the background to other scenery.
Reisho
Reisho stones represent metal. These stones are vertical and low to the ground. Reisho stones are considered firm and steady, much like metal is. When placed in a Zen garden, Reisho stones are often put with tall, vertical stones such as Taido. Reisho stones are also known as soul stones.
Other Meanings
Zen stones are placed in Zen gardens to represent various elements of life. Stones are natural and reflect the balance between man-made structures and nature. Zen stones represent what is not actually featured in a Zen garden, such as islands and water.