Grammar Info
N2 Lesson 5: 13/18

based on, from, according to

Noun + をもとに(し
Noun + をもとにした + Noun
Register Standard
使用域 一般
When linked to a noun, を元(もと)に is an expression that indicates that something is ‘based on (A)’, ‘from (A)’, or ‘according to (A)’. This is a combination of , the noun 元(もと) ‘origin’, and . The literal meaning is similar to ‘with (A) as the origin, (B)’, and is used primarily to reference a source from which something is created or started.
  • このドラマは実際(じっさい)に起(お)こったことをもとに作(つく)られたそうだ。
    Apparently, this TV show was created based on actual events.
  • 研究(けんきゅう)の結果(けっか)をもとにレポートを書(か)いてください。
    Please write a report based on the results of the research.
  • 私(わたし)はこのデータをもとにこのグラフを作成(さくせい)しました。
    I created this graph based on this data.
Most of the time, をもとに will be written without kanji, but it is also possible to see it as を元(もと)に.
As this grammar pattern is mainly used to highlight an origin of creation, it will often be seen in sentences that use verbs like 書(か)く ‘to write’, できる ‘to be able’, and 作(つく)る ‘to make’.
Caution - を元(もと)に ‘based on’ differs to に基(もと)づいて ‘based on’, in that に基(もと)づいて indicates a foundation from which the judgement or conclusion of (B) is made, while を元(もと)に focuses more on being a source of inspiration for (B), or enabling (B).
  • 彼(かれ)は法律(ほうりつ)に基(もと)づいて処分(しょぶん)されるだろう。
    He will be receiving punishment according to the law.
  • 彼(かれ)は法律(ほうりつ)をもとに処分(しょぶん)されるだろう。
    He will be punished based on the law.
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I heard that this romance manga is based on actual events.
The amount of tax is calculated based on revenue in a fiscal year.
Robots based on the shape of an actual fish are living with ordinary fish and are collecting data about marine life.
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新完全マスター文法 N2
Page 38