At a glance
Noun をもとに means "based on [noun]". The noun is the source material or hint that something new is made from, such as a story, data, or an experience.
[Noun] をもとに(して) [verb clause]
[Noun] をもとにした [Noun]
彼は自分の経験をもとに本を書きました。 He wrote a book based on his own experience.
How to form it
をもとに attaches directly to a noun.
| Form | Position | Example | Meaning |
|---|---|---|---|
| Noun をもとに | Before a verb clause | データをもとに決める | decide based on data |
| Noun をもとにして | Before a verb clause | 写真をもとにして描く | draw based on a photo |
| Noun をもとにした | Before a noun | 実話をもとにした映画 | a film based on a true story |
| Noun をもとにしている | End of sentence | 実話をもとにしています | is based on a true story |
Register: neutral. It is common in both writing and speech, and very common in news and business.