Answer:
Water fountains have long been used in Japanese gardens as both decorative and meditative items. The water element is very important in Feng Shui which is derived from Asian philosophy and which governs how, why and where a water fountain is placed within a Japanese garden.
Japanese garden style attempts to balance the elements in nature, often referred to as Yin and Yang, so there is harmony within the garden which will make it a peaceful and relaxing environment. The use of water is an important element to consider in this process.