～ことから — Judging From The Fact
Introduces the basis, evidence, or reason from which a conclusion, judgment, or name is derived: 'from the fact that ~, ...' or 'because ~, that is why ...'. It is common in explanations of how something got its name or in reasoning from observed evidence. More objective and written than から.
Structure
[Verb/い-adj plain] / [な-adj な・である] / [Noun である] + ことから
Examples
煙が出ていることから、火事だと分かった。
Kemuri ga dete iru koto kara, kaji da to wakatta.
From the fact that smoke was rising, we knew it was a fire.
煙が出ている + ことから = judgment drawn from that evidence
富士山に似ていることから、この山は「〇〇富士」と呼ばれる。
Fujisan ni nite iru koto kara, kono yama wa 'marumaru Fuji' to yobareru.
Because it resembles Mt. Fuji, this mountain is called a 'local Fuji'.
似ている + ことから explains the origin of the name
彼女の顔色が悪いことから、体調が悪いと察した。
Kanojo no kaoiro ga warui koto kara, taichou ga warui to sasshita.
From the fact that she looked pale, I sensed she was unwell.
顔色が悪い + ことから = reasoning from an observed fact
• Frequently used to explain the origin of names, nicknames, and titles. • More objective/logical and written than から or ので. • The second clause is usually a conclusion, judgment, or established fact — not a command or request.
Commonly confused with
The JLPT rarely asks whether you recognise a pattern — it asks which of several similar patterns fits. These are the ones ～ことから is tested against.
vs から
から states a subjective, direct reason for an action; ことから presents an objective fact as the grounds for a conclusion or naming.
vs ことだから
ことだから reasons from someone's known character ('since it's him, ...'); ことから reasons from an observed fact or evidence.
More cause & effect
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