Translation guide
The central pillar of a pagoda is a specific architectural element. In Japanese, it is called 心柱 (shinbashira). This term is technical and primarily used in contexts related to traditional Japanese architecture.
Referring to the central pillar inside a traditional Japanese pagoda
The standard technical term for the central pillar of a pagoda. It is a compound of 心 (heart/center) and 柱 (pillar).
The central pillar of the five-story pagoda runs through the center of the building.
A more descriptive phrase meaning 'central pillar'. It can be used when explaining the concept to someone unfamiliar with the technical term.
The central pillar of that tower has the role of absorbing shaking during earthquakes.