Set on top of the terrace, the roof garden is surrounded on all four sides by a fence structure with a height of 1.5 m.  Therefore, it is almost totally secluded from the outside, and the only opening is up toward the sky.  On the right side is equipment rooms with water tank. The indoor activity space and the outdoor garden are connected by a wood-structured portico, in which people can enjoy sightseeing.  Green space and rest space alternate in the garden, dividing the whole space into two scenarios with distinct features: one is serene, the other is open.  But these two apparently-separated spaces are actually linked by water systems, which enrich the value of the scenery.