In the book of secrets "Sakutei-ki," that describes the technique of allocating space, water fall/stream, plant gardening written in the late Heian period, insists that the motif of a garden should come from natural scenery.
平安時代後期に庭園の地割、石組、滝・遣水、植裁等の技法について著された秘伝書『作庭記』には自然の風景からモチーフを得るという主張が貫かれている。