noun, noun which may take the genitive case particle 'no'
Refers to the upper section or surface of an object, structure, or area. Often used in descriptions of physical objects, documents, or screens.
The menu is displayed at the top of the screen.
The upper part of this machine can be removed.
A sign is attached to the top part of the building.
I cropped the image by cutting off the top part.
上方 emphasizes relative direction or position (the area above something), while 上部 more generally names the physical upper portion of an object or structure.
下部 means the lower part of something, the direct opposite of 上部, the upper part.
Compound of 上 (じょう, 'upper') and 部 (ぶ, 'part'). A straightforward Sino-Japanese word.