25 JLPT N3 Mistakes That Cost You Points

JLPT N3 is the level where grammar stops being about right-or-wrong and starts being about right-or-more-right. At N4, there is usually one clearly correct answer. At N3, exam questions present four choices where two or three seem plausible, and the difference between the correct answer and the best distractor is a matter of nuance, context, or register. This is why the N3 fail rate stays stubbornly high even among dedicated students.

This guide catalogs 25 specific mistakes organized by category. Each entry explains why the mistake happens, shows the difference with examples, and provides a fix. If you are preparing for N3, treat this as a pre-exam diagnostic: work through each mistake and honestly assess whether you would get it right under time pressure.

Part 1: Conditional Confusion (Mistakes #1-4)

Japanese has four main conditional forms, and N3 is the level that tests all four. This is the single most common source of grammar errors on the exam.

Mistake #1: Using たら When と Is Required

The confusion: Both たら and と can express “if/when,” but と is used for natural consequences, habitual results, and discoveries—situations where the result always happens or has already happened.

The rule: と is for inevitable results, natural laws, habitual sequences, and discoveries. たら is for one-time events, hypothetical situations, and when you want to express surprise or personal experience. The exam tests this distinction relentlessly.

Mistake #2: Using ば When たら Is Required

The confusion: ば expresses a conditional that focuses on the condition itself. たら focuses on what happens after the condition is met.

The critical rule for the exam: You cannot use ば when the second clause contains a volitional action (request, command, invitation, suggestion). This rule alone eliminates many wrong answers: if the sentence ends with ~てください, ~ましょう, or ~たいです, choose たら over ば.

Mistake #3: Misusing なら

The confusion: なら expresses a condition based on the listener’s statement or a hypothetical premise. It often translates as “if it is the case that...”

Wrong: あしたあめがふるなら、かさをもっていきます。

More natural: あしたあめがふったら、かさをもっていきます。

Correct use of なら: A: にほんにいきたいです。B: にほんにいくなら、きょうとがおすすめです。(“If you are going to Japan, Kyoto is recommended.”) Here, なら responds to something the other person said or decided.

The rule: なら takes the premise from context (what someone said or what is assumed). It does not describe a future uncertain event. If the condition is about weather, time, or uncertain future events, use たら or ば instead.

Mistake #4: Mixing Up All Four in One Question

The exam frequently presents a sentence with all four conditionals as answer choices. Here is how to systematically eliminate wrong answers:

1. Does the sentence end with a request, command, or suggestion? Eliminate ば and と. Choose between たら and なら.
2. Is the result a natural/inevitable consequence? Choose と.
3. Is the condition based on something the listener said? Choose なら.
4. Is the condition a one-time hypothetical event? Choose たら.
5. Is the condition general/hypothetical with no specific time? Consider ば.

Part 2: Passive and Causative Errors (Mistakes #5-8)

Mistake #5: Passive Form Conjugation Errors

The passive form is constructed by changing the verb ending to the -a column and adding れる. Group 1: のむ → のまれる. Group 2: たべる → たべられる. But learners mix up passive (られる) and potential (られる) for Group 2 verbs because the forms are identical.

The ambiguity: たべられる can mean “is eaten” (passive) or “can eat” (potential). Context determines the meaning. On the exam, pay attention to the particle: を marks the object of eating (potential), に marks the agent who does the eating (passive). せんせいにしかられた = scolded by the teacher (passive). すしがたべられる = can eat sushi (potential).

Mistake #6: Causative Form Confusion

The causative form (させる/せる) means “to make/let someone do.” The confusion: whether the nuance is “forcing” or “allowing.”

Forcing: せんせいはがくせいにレポートをかかせた。(The teacher made the students write a report.)

Allowing: はははこどもにあそばせた。(The mother let the child play.)

The difference is determined by context and the relationship between the causer and the doer. The exam tests whether you can identify the correct interpretation. When the causer has authority over the doer (teacher/student, boss/employee, parent/child), the nuance is usually “making.” When the doer wants to do the action, the nuance is “letting.”

Mistake #7: Causative-Passive Double Confusion

The causative-passive form (させられる) means “to be made to do”—someone forces you to do something and you are the victim. This is the most difficult conjugation at N3.

Example: わたしはじょうしにざんぎょうさせられた。(I was made to work overtime by my boss.)

The conjugation chain: する (do) → させる (make do) → させられる (be made to do). For Group 1 verbs, the shortened form is common: のむ → のませる → のまされる (be made to drink). The exam may present both the full form (のませられる) and the shortened form (のまされる)—both are correct.

Mistake #8: Using Active When Passive Is Required

Japanese uses passive voice in situations where English uses active voice, particularly the “suffering passive” (meiwaku no ukemi). Beginners often fail to recognize when passive is the natural choice.

Natural in Japanese (passive): あめにふられて、ぬれてしまった。(I was rained on and got wet.)

Unnatural (active): あめがふって、ぬれてしまった。(It rained and I got wet.) — Grammatically correct but does not express the speaker’s inconvenience as effectively.

On the exam, if the sentence expresses inconvenience, annoyance, or suffering caused by someone else’s action, the passive form is likely the correct answer.

Part 3: Confusing Grammar Pairs (Mistakes #9-16)

Mistake #9: ことがある vs たことがある

ことがある (dictionary form + ことがある): Sometimes happens. 日本語をわすれることがある。(I sometimes forget Japanese.)

たことがある (た-form + ことがある): Have experienced. 日本にいったことがある。(I have been to Japan.)

The tense of the verb before ことがある completely changes the meaning. Present = “sometimes happens.” Past = “have the experience of.” The exam gives sentences where only one interpretation makes sense.

Mistake #10: ようにする vs ことにする

ようにする: Try to do / make an effort to. まいにちやさいをたべるようにしている。(I try to eat vegetables every day.) Implies ongoing effort toward a habit.

ことにする: Decide to do. あしたからやさいをたべることにした。(I decided to start eating vegetables from tomorrow.) Implies a one-time decision.

The exam tests whether the context describes an ongoing effort (ようにする) or a decisive moment (ことにする).

Mistake #11: ようになる vs ことになる

ようになる: Come to be able to / come to a state where. にほんごがはなせるようになった。(I became able to speak Japanese.) A gradual change in ability or state.

ことになる: It has been decided that / it turns out that. らいげつにほんにいくことになった。(It has been decided that I will go to Japan next month.) An external decision or outcome.

Mistake #12: ために vs ように

ために: In order to (with volitional verbs). にほんごをべんきょうするために、にほんにきた。(I came to Japan in order to study Japanese.)

ように: So that (with non-volitional/potential verbs). にほんごがはなせるように、まいにちれんしゅうしている。(I practice every day so that I can speak Japanese.)

The rule: ために takes volitional verbs (actions you choose to do). ように takes non-volitional verbs (potential forms, negative forms, states). This is one of the most frequently tested grammar distinctions at N3.

Mistake #13: てしまう (regret) vs てしまう (completion)

てしまう has two meanings, and the exam tests whether you can identify which one based on context.

Completion: しゅくだいをぜんぶやってしまった。(I finished all the homework.) Neutral or positive tone.

Regret/Unintended result: さいふをなくしてしまった。(I lost my wallet.) Negative feeling about an unintended outcome.

The context determines the meaning. If the result is negative or unintended, the regret meaning applies. If the result is a completed task, the completion meaning applies.

Mistake #14: ところ time expressions

The word ところ combined with different verb tenses creates precise time expressions that the exam loves to test.

• Verb (dictionary form) + ところ: About to do. いまでかけるところです。(I am about to leave now.)
• Verb (ている) + ところ: In the middle of doing. いまべんきょうしているところです。(I am in the middle of studying now.)
• Verb (た-form) + ところ: Just did. いまかえってきたところです。(I just got home.)

The exam presents a situation and asks which ところ form fits. Pay attention to time markers: いまから (from now) suggests dictionary form. ちょうどいま (right now) suggests ている. たったいま (just now) suggests た-form.

Mistake #15: はず vs べき vs つもり

はず: Should be (expectation based on evidence). かれはもうきたはずです。(He should have arrived already.) Based on schedule or evidence.

べき: Should (moral obligation/advice). もっとべんきょうすべきです。(You should study more.) Based on what is right or advisable.

つもり: Intend to. あしたいくつもりです。(I intend to go tomorrow.) Based on the speaker’s own intention.

The exam uses these in contexts where the distinction matters: evidence-based expectation (はず), moral/practical advice (べき), or personal intention (つもり).

Mistake #16: ばかり Multiple Meanings

ばかり has different meanings depending on what it attaches to.

• た-form + ばかり: Just did (recently completed). にほんにきたばかりです。(I just came to Japan.)
• Noun + ばかり: Nothing but, only. にくばかりたべている。(You eat nothing but meat.)
• Dictionary form + ばかり: Only does, does nothing but. テレビをみるばかりで、べんきょうしない。(Does nothing but watch TV and does not study.)

Part 4: Reading Comprehension Errors (Mistakes #17-20)

Mistake #17: Fixating on Unknown Words

N3 reading passages contain words you will not know. This is by design. The exam tests whether you can extract meaning from context despite vocabulary gaps. The mistake: reading a sentence with an unknown word three times, convinced you need to understand it before moving on. The result: you waste 2-3 minutes on one sentence and run out of time later.

The fix: If you encounter an unknown word, check whether the question asks about that specific word. If not, skip it and extract meaning from the surrounding sentences. In most cases, the unknown word is not critical to answering the question.

Mistake #18: Missing the Main Point

N3 reading questions frequently ask “what is the author’s main argument?” or “what does the author want to say?” The mistake: choosing an answer that is a detail mentioned in the passage rather than the main point.

The fix: The main point usually appears in the final paragraph or after expressions like つまり (in other words), けっきょく (ultimately), いちばんだいじなのは (the most important thing is). Read the conclusion first to identify the main claim, then verify with the rest of the passage.

Mistake #19: Misreading Negative Constructions

Japanese frequently uses double negatives and indirect negation that confuse non-native readers. N3 passages use constructions like: ~ないわけではない (it is not that it is not = it somewhat is), ~ないとはいえない (it cannot be said that it is not = it might be), ~ということではない (it does not mean that = clarifying a misconception).

The fix: When you encounter a negative construction, slow down and parse it literally. Count the negatives: an even number of negatives usually equals a positive statement. An odd number equals a negative statement.

Mistake #20: Ignoring Discourse Markers

N3 passages use discourse markers that signal the logical structure of the text. Missing these markers means missing the logical flow, which leads to wrong answers on questions about the author’s reasoning.

Key discourse markers to watch for: しかし/だが (however — contrast follows), したがって/そのため (therefore — conclusion follows), たとえば (for example — illustration follows), つまり (in other words — restatement/summary follows), たしかに...しかし (certainly...however — concession followed by the real opinion).

Part 5: Time Management and Strategy (Mistakes #21-25)

Mistake #21: Spending 3+ Minutes on One Grammar Question

The grammar section at N3 should take approximately 15 minutes for all questions. That means less than 1 minute per question. If you spend 3 minutes on one question, you steal time from the reading section, which is where most points are available.

The fix: Set a hard rule: if you cannot answer a grammar question in 60 seconds, choose your best guess and move on. The 1-2 points you might gain from agonizing over a difficult grammar question are worth less than the 5-10 points you lose by rushing through reading passages.

Mistake #22: Not Reading Questions Before Passages

Reading a passage without knowing what questions will be asked forces you to read the passage twice: once to understand it, once to find answers. At N3, you do not have time for this.

The fix: Always read the questions (not the answer choices, just the questions) before reading the passage. This tells your brain what information to look for, making your first read-through productive and often eliminating the need for a second pass.

Mistake #23: Equal Time for All Reading Passages

N3 reading has short, medium, and long passages. Spending equal time on each is inefficient because short passages can be answered in 2 minutes while long passages require 8-10 minutes.

Mistake #24: Answering Too Slowly in Listening

In the listening section, you have a short pause between questions to mark your answer. If you are still thinking about the previous question when the next one starts, you miss the beginning of the new audio—and that beginning often contains critical context.

The fix: Make your answer choice the moment the audio ends. Do not second-guess. If you are uncertain between two choices, pick one and commit. The cost of missing the next question’s opening is higher than the cost of getting the current question wrong.

Mistake #25: Not Practicing Full-Length Timed Tests

Many N3 students study grammar, vocabulary, and reading in isolation but never take a full-length practice exam under timed conditions. The result: they experience the exam’s time pressure for the first time on test day, leading to panic and poor decisions.