ばこそ
- 1Explains the sincere motive behind an action, often one that looks harsh or surprising on the surface.Ex. 2
- 2Credits a particular condition, and nothing else, as the true reason for a present state or result, usually a favorable one.Ex. 1
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A formal, literary pattern found in writing, speeches and earnest statements. The main clause often ends in のだ or のです, and it typically explains a motive or accounts for a present good result. It is a stiffer, more emphatic counterpart of からこそ.
Note that despite the ば form, ばこそ states an actual reason, not a hypothetical condition.
Learners should avoid ばこそ in casual conversation, where からこそ sounds more natural.
- からこそN2「からこそ」has the same meaning but attaches to plain forms (nouns and な-adjectives use 「だからこそ」). It is neutral in register and common in everyday conversation; most 「ばこそ」 sentences can be rewritten with 「からこそ」, which sounds plainer.
- てこそN2「てこそ」attaches to the て-form of verbs (nouns use 「でこそ」) and means 'only when... does...', emphasizing an indispensable condition; it is neutral in register. 「ばこそ」emphasizes an already-established reason and is more formal, so the two are generally not interchangeable.
- だけにN2「だけに」attaches to plain forms and is neutral in register. It emphasizes that the following clause matches or even exceeds what the premise would suggest, and can also express deeper disappointment when expectations are betrayed. Unlike 「ばこそ」, it is not used to state the motive for one's own actions, so the two are usually not interchangeable.
- だけあってN2「だけあって」means 'as befits...' — the following clause is a result matching the subject's status, experience, etc., often carrying an evaluative nuance; it is neutral in register. 「ばこそ」emphasizes a reason or true motive with a formal tone, so the two are generally not interchangeable.
- ことからN2「ことから」calmly states factual grounds, often explaining the origin of a name or the basis of a judgment, and the following clause cannot be an expression of volition. 「ばこそ」subjectively emphasizes a reason, expressing the speaker's feelings or conviction, and often takes 「のだ」, so the two are generally not interchangeable.
からこそ has the same "precisely because" meaning but is more conversational, while てこそ means "only by doing X can Y happen" and states a necessary condition rather than a reason. だけあって means "as one would expect given X"; だけに can mean the same, but it can also mean "all the more because of X" (期待していただけに失望した). ことから gives a basis for a judgment or name, and none of these three singles out one reason with the emphatic "it is exactly this reason" nuance of ばこそ.
