1.
origin, starting point, foundation
The fundamental starting point or basis of something. Used figuratively to refer to the core principles or beginnings that define a person, project, or idea. Also used in mathematics and coordinates to mean the origin point (0,0).
Often used metaphorically to express the idea of returning to fundamentals or rediscovering one's roots. The phrase 原点に立ち返る or 原点に戻る (to return to the origin) is extremely common.
Not to be confused with 減点 (deduction of points), which is a homophone with a completely different meaning.