Besides the core point, tanzen, there are other parts of the body that can serve us well in kiko. The Bi-Tei-Kotsu, root tail bone, or sacred bone at the tail of the spine, is a major pause on the route of energy; with it's path from the center of the earth to the heavens above; the earth and water wheels brush against eachother here. How about the Solar Plexus, related to the Sun. We often use this as the overlap between the water wheel of the Hara (belly), and the Fire Wheel of the Kokoro (Heart). The unaji or nape of the neck is an oft forgotten space below the base of the skull. This section of spine corresponds to the wheel of wind & sound, as it parallels the line of the throat, mouth, and nose. The Crown of the head is a wonderful jumping off point for the spinning energy as it continues the path from earth to heaven. The use of these create interesting experiences with our bodies and the space we live in.