をもとに
Based on / using … as the foundation
N1
Meaning
Based on / using … as the foundation
Formation
Noun + をもとに（して） + Verb
Noun + をもとにした + Noun
Explanation
をもとに is used to indicate that something is built, created, or decided by using a specific source as its foundation.
🔸 をもとに ≠ 原因
The “base” (もと) is:
data
facts
experiences
records
theories
real events
The important nuance is that:
the base already exists
it is reliable or objective
the final result is not a copy, but a new outcome developed from it
This grammar focuses on logical grounding, not emotions.
It is highly formal and is commonly used in:
reports
research
policies
planning documents
JLPT N1 reading passages