JLPT N1 Cause, reason, and pretext

もので (mono de): because; for that reason

Use もので when you want to give a reason or explanation that feels personal, subjective, or somewhat beyond your control.

電車が遅れたもので、少し遅刻しました。 — I was a little late because the train was late.

ゆえに (yue ni): therefore; consequently; because of; due to

Use ゆえに when you want to express that one fact or quality logically leads to a particular result. It marks the cause and then presents the inevitable outcome.

彼は若かったゆえに過ちを犯した。 — He made a mistake because he was young.

何しろ (nani shiro): at any rate; after all; anyhow; anyway; in any case; because; as you know

Use 何しろ when you want to introduce an explanation, a reason, or a circumstance that justifies or clarifies the main statement.

何しろ初めての経験だったので、緊張しました。 — After all, it was my first experience, so I was nervous.

こともあって (koto mo atte): partly because; also because of; plus the reason for

Use こともあって when you want to express that a result or situation is influenced by a particular reason, but you’re not saying that reason is the only explanation. It often appears when listing or implying multiple causes, and it softens the causal link.

昨日は雨だったこともあって — Partly because it rained yesterday, the shop was empty.

とあって (to atte): due to the fact that; because of

Use とあって when you want to state that a result happened precisely because of the situation described before it. The pattern tells the listener “given X, it’s only natural that Y happened.” The cause is usually a factual, public, or widely known condition, not a private feeling.

初めての海外旅行とあって、彼はとても興奮していた。 — Since it was his first trip abroad, he was very excited.

ときている (to kiteiru): because of

Use ときている when you want to express that a result is the direct, often unavoidable consequence of a specific situation. The nuance is: “given that X is the case, it’s only natural that Y happens (and that’s a problem).

雨が降るときているから、外出できない。 — Since it’s raining, I can’t go out. (complaint implied)

こととて (koto tote): because; since

Use こととて when you want to explain that something happened (or will happen) because of a certain situation, with an undertone of “it can’t be helped” or “I hope you’ll understand.” It’s a formal, slightly old-fashioned way of saying “since.

不慣れなこととて、不行届きの点もあったかと存じます。 — As I am still inexperienced, there may have been some shortcomings. (formal apology)

ばこそ (ba koso): only because

Use ばこそ when you want to emphasize that something occurs *only* because of a certain reason, and that if that reason didn't exist, the result would be different. It carries a strong sense of “if it weren’t for this, it wouldn’t be so.

君を信じていればこそ、厳しく言うのだ。 — It is precisely because I believe in you that I speak harshly.

あっての (atte no): which can exist solely due to the presence of; which owes everything to

Use あっての when you want to say that B owes everything to A—that B cannot exist or hold meaning without A.

学生あっての学校だ。 — A school exists only because of its students.

と相まって (to aimatte): together with..., more; because of the influence of..., more

Use と相まって when you want to express that multiple conditions, qualities, or circumstances interact and make a result stronger, more noticeable, or more extreme.

天候の悪さと交通渋滞とが相まって、到着が大幅に遅れた。 — The bad weather coupled with the traffic jam caused the arrival to be significantly delayed.

手前 (temae): considering; before; in front of; one’s standpoint

Use 手前 when your own prior action or declaration creates a situation where you must do something or cannot do the opposite without seeming inconsistent or unreliable.

ではあるまいし (dewa arumai shi): it’s not like; it isn’t as if

Use ではあるまいし when you want to reject a hypothetical scenario to justify an action or expectation. It sets up a contrast: “(It’s) not like X, so Y should hold / Y is only natural.

子供ではあるまいし、自分で片付けなさい。 — You’re not a child, so clean up after yourself.

をいいことに (o ii koto ni): to take advantage of

Use をいいことに when you want to say that a person treats a certain situation as *a good thing* and exploits it to their advantage. The nuance is almost always negative or critical, though occasionally neutral when no moral judgement is implied.

彼は上司の不在をいいことに、いつも早退している。 — He always leaves early, taking advantage of his boss’s absence.

にかこつけて (ni kako tsukete): to use as a pretext; to use as an excuse

Use にかこつけて when you want to express that someone is using a stated reason to hide a different, usually self-serving, true purpose.

彼は仕事にかこつけて、家事を全然しない。 — He uses work as a pretext to do no housework at all.