It is said the reason why they used these metaphors is that common scenery that people share was necessary for a Jodo style garden (a garden of the style of the Jodo sect of Buddhism) and Shinsen (the thought of immortality), gardens that relate thoughts from ancient times because these gardens need to communicate what they expressed as models, with a large number of the general public.
このようなメタファーを用いたのは、それが表現するものを不特定多数の人に伝える浄土式庭園や神仙などのような古来の思想を含んだ庭には表現すべきモデルとしての、人々が共有する景が必要であるからとされる。