noun, noun which may take the genitive case particle 'no'
Refers to the very first beginning or origin of something, often in a formal or abstract context. Can be used as a noun or with の to modify another noun.
宇宙の始原について研究している。
I am researching the origin of the universe.
この問題の始原を探る必要がある。
We need to investigate the beginnings of this problem.