JLPT N1 Conditionals, warnings, and depending on
とあれば and となると set up a condition in formal speech, while たら最後 and ばそれまでだ warn that once something happens, it is over. いかんでは and にかかっている make the result depend on one factor, and たら～ところだ describes a counterfactual "would have". たら最後 always leads to a bad or irreversible outcome, so it cannot carry a neutral "if".
14 N1 grammar points in this group
とあれば (to areba): if it is the case that; if
Use とあれば when you want to say “if it is the case that X, then Y” with the nuance that Y is a strong commitment, a logical necessity, or a dramatic shift in stance because of X. The condition is often presented as significant, personal, or exceptional.
あなたのためとあれば、何でもする。 — If it’s for you, I’ll do anything.
となると / となれば (to naru to / to nareba): when it comes to; in such a case; if that happens
Use となると / となれば when you want to say "if it comes to that" or "when it comes to X". It signals that the speaker is presenting a condition (often a new piece of information or a hypothetical scenario) and then drawing a conclusion or describing a natural reaction.
彼が反対するとなると — If he's against it, the plan becomes difficult.
たら～たで (tara ~ tade): if / in the case... of course / should
Use たら～たで when you want to express that if something happens, then that situation brings its own outcome (often a problem or a given reality). It can also imply “should that be the case, well… that’s another story.
雨が降ったら降ったで、傘を買えばいい。 — If it rains, then that’s fine — I can just buy an umbrella.
たら～ところだ (tara ~ tokoro da): if... (counterfactual condition), then would be
Use たら～ところだ when you want to say that if the condition in the past (or a hypothetical state) were different, the present situation would be just about to turn out in a certain way.
あと5分遅かったら、電車に乗り遅れるところだ。 — If I had been five minutes later, I would be about to miss the train.
さもないと (samonaito): otherwise; or else; if not
Use さもないと when you want to state that a negative outcome will follow if the preceding situation is not acted upon or changed.
早く宿題を終わらせなさい。さもないと遊びに行けませんよ。 — Finish your homework quickly. Otherwise, you can't go out to play.
なくしては (nakushite wa): cannot do without
Use なくしては when you want to express that a result is impossible or meaningless without a certain thing.
努力なくしては、成功は有り得ない。 — Without effort, success is impossible.
ても知らない (temo shiranai): if you continue… you’ll end up; I don’t care about it
Use ても知らない when you want to: - warn someone that a bad outcome will follow if they continue a certain action - disclaim responsibility (“I won’t be responsible”) - express irritation, indifference, or a “serves you right” stance
そんなに夜 更かししてると、後で後悔しても知らないよ。 — If you keep staying up so late, don’t come complaining later.
ばそれまでだ / たらそれまでだ (ba sore made da / tara sore made da): if… then it’s over
Use this pattern when a single condition irreversibly ends a state, hope, advantage, or effort. The nuance is not just “then it ends” — it’s “if that happens, then everything up to that point becomes meaningless.
一度信頼を失えばそれまでだ。 — If you lose trust once, that’s the end of it.
たら最後 / たが最後 (tara saigo / taga saigo): if you do...; once you do, it's all over (negative result)
Use たら最後 / たが最後 when one action inevitably leads to a bad, often extreme, result. The pattern can describe personal habits, social rules, or hypothetical scenarios. The key is that the result is negative and irreversible.
彼に秘密を話したら最後、すぐに全校に広まってしまった。 — Once I told him the secret, it spread throughout the whole school in no time — there was no stopping it.
ならいざしらず / はいざしらず (nara iza shirazu / wa iza shirazu): I don't know about ... but; it may be possible for ... but
Use ならいざしらず / はいざしらず when you want to draw a sharp contrast by setting aside one case as possibly excusable or uncertain, in order to highlight that another case is definitely not, or that the speaker's judgment is absolute.
彼ならいざしらず、私にはできない。 — I don't know about him, but I can't do it.
ようによっては / ようでは (you ni yotte wa / you dewa): depending on the way; depending on how; according to how
Use ようによっては when you want to express that an outcome varies depending on the way something is done. The result is not fixed — it hinges on the method, approach, or perspective.
やり方ようによっては、もっと早く終わったはずだ。 — Depending on how you did it, you could have finished much sooner.
にかかっている (ni kakatteiru): depending on; to depend on; whether or not
Use にかかっている when you want to say that the result is determined by, rests on, or hinges on a single factor. It often carries a sense of urgency or finality: *this is what it all comes down to*.
試合の勝敗は、最後の数秒にかかっている。 — The outcome of the match depends on the final few seconds.
いかんだ / いかんでは / いかんによっては (ikan da / ikan dewa / ikan ni yotte wa): in accordance with; depending on; whether or not
Use いかんだ / いかんでは / いかんによっては when you want to express that something is determined by, contingent on, or conditional upon the state or nature of the preceding noun.
今後の努力いかんだ。 — It depends on your future efforts.
にかかっては / にかかったら / にかかると / かかれば (ni kakatte wa / ni kakattara / ni kakaru to / kakareba): when handled by (N), becomes a completely different result
Use にかかっては / にかかったら / にかかると / かかれば when you want to express that when handled by (N), becomes a completely different result.
彼にかかれば、難しい問題も簡単に解決できる。 — When he handles it, even difficult problems can be solved easily.
More JLPT N1 grammar groups
- Although, despite, and against expectation (18)
- Regardless, whether, and no matter what (14)
- Cause, reason, and pretext (14)
- Purpose, intention, and doing two things (15)
- Time: as soon as, turning points, since (23)
- Should, must not, and worth doing (20)
- Strong feelings, extremes, and endings (23)
- Conjecture, likelihood, and judgment (21)
- Cannot, without, and bad outcomes (18)
- Emphasis, limits, and comparison (27)
- Listing examples and alternatives (14)
- Formal relational phrases (13)
- Appearance, tendency, and suffixes (20)