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).
五重塔の心柱は、建物の中心を貫いている。
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.
あの塔の中心の柱は、地震の時に揺れを吸収する役割がある。
The central pillar of that tower has the role of absorbing shaking during earthquakes.