〜をもとに means "based on" — using X as the foundation, source, or reference material.
Source material - Based on this data/book/story
Foundation - Using X as a starting point
It''s a movie based on a true story.
Often used for adaptations, research, decisions.
Noun + をもとに(して)
Variants:
- をもとに
- をもとにして
- に基づいて (more formal, same meaning)
We analyzed it based on the survey.
A drama was made based on this novel.
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