Kotomora
JLPT N1ConstructionWritten
Furigana

らして・らすとIn light of; judged against

らして and らすと present a rule, standard, evidence, precedent, or established fact as the benchmark used to evaluate something. The important idea is comparison against that benchmark, not merely using it as background information.

Keep the benchmark and the case separate

The noun before the expression is the benchmark, while a different matter is evaluated afterward. Typical benchmarks include laws, regulations, criteria, evidence, precedent, historical facts, and accepted social norms.

ていらしてしんせいないようしんした。

The application was reviewed against the regulations.

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The regulations are the benchmark, and the application is the separate matter being reviewed.

げんてんしょうらすと、そのせつめいにはもんのこる。

In light of the evidence currently available, that explanation remains questionable.

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The second part gives the judgment reached by checking the explanation against the evidence.

Choosing between the two forms

らして smoothly introduces the basis on which someone reviews, interprets, or decides something. らすと is particularly useful when the following clause states the conclusion that becomes apparent after the comparison. Their meanings overlap, so this is a difference of sentence focus rather than a rigid rule.

Evaluation versus compliance

らして checks or evaluates a case against a rule. By contrast, のっとって says that an action is performed in conformity with the rule. If the point is simply that someone followed a procedure, the latter is the natural choice.

しゃないていのっとってつづきをすすめた。

The procedure was carried out in accordance with the company regulations.

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This describes compliance with the regulations, not an evaluation made by comparing something against them.

More examples

くにしんらしてとうしゃあんぜんたいさくさいひょうした。

We reassessed our company’s safety measures against the national guidelines.

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はんれいらすと、このしょぶんおもすぎる。

Judged against past precedents, this penalty is too severe.

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しんじゅんらしていんかいさいようおくった。

After evaluating it against the screening criteria, the committee decided not to approve it.

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れきてきじつらすと、そのかいしゃくたない。

In light of the historical facts, that interpretation does not hold up.

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しゃかいつうねんらして、そのこうこくひょうげんてきせつけんとうする。

We will consider whether the wording of the advertisement is appropriate when judged against accepted social norms.

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ていしゅつされたりょうらすとすうしゅうせいひつようだ。

In light of the submitted materials, the figures need to be corrected.

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