源氏雲・げんじぐも・genjigumo
A cloud design dating back to the Edo period, and used extensively in the Tale of Genji illustrations (Genji Monogatari Emaki) that were popular at that time. A partial cloud cover revealing the world/scenery below.
It shows stylized clouds from above allowing a birdseye view between the clouds on the partially obscured scenery below. Perspective and proportions are often exaggerated.
The clouds can be of a simple plain outlined design so the focus is on the scenery, or they can be elaborately decorated blending into the overall design.