20 Most Common JLPT N4 Mistakes (And How to Fix Them)

JLPT N4 has an approximate pass rate of 35-40%. That means roughly 6 out of every 10 test-takers fail. The reasons are not random—the same mistakes appear in post-exam analyses again and again. This guide catalogs the 20 most common errors, explains why they happen, and provides specific strategies to eliminate each one. If you are preparing for N4, this is your checklist of traps to disarm before exam day.

Overview: Where Points Are Lost

Grammar Mistake #1: Confusing ている and てある

The mistake: Using ている and てある interchangeably because both describe states.

Why it happens: In English, both translate to something like “is [done].” “The window is open” could be either ている or てある in Japanese, and learners do not understand when to use which.

The actual difference:

• ている describes a current state without emphasizing who caused it. 窓が開いている = The window is open (it’s in an open state). Uses intransitive verbs (開く).
• てある describes a state that someone intentionally created, and that state serves a purpose. 窓が開けてある = The window has been opened (someone opened it deliberately, perhaps for ventilation). Uses transitive verbs (開ける).

Exam example:

壁にカレンダーが（　　）。

A) かかっている   B) かけてある   C) かけている   D) かかってある

Answer: Both A and B are grammatically possible, but they mean different things. A (かかっている) = A calendar is hanging on the wall (neutral observation). B (かけてある) = A calendar has been hung on the wall (someone put it there on purpose). The exam context determines the answer. If the passage describes someone decorating a room, choose B. If it simply describes what a room looks like, choose A.

How to fix it: Practice with 20+ sentence pairs that contrast ている and てある using the same base action. For each pair, ask: “Does this sentence care about who did the action and why?” If yes: てある. If no: ている.

Grammar Mistake #2: Mixing Up ようにする and ことにする

The mistake: Using ようにする when you mean ことにする, or vice versa.

The actual difference:

• ようにする = make an effort toward a habit or ongoing change. 毎日野菜を食べるようにしている = I try to eat vegetables every day (it’s an ongoing effort, not a single decision).
• ことにする = make a specific decision. 明日から野菜を食べることにした = I decided to eat vegetables starting tomorrow (a specific, one-time decision).

Quick test: Can you add “starting from today” naturally? If yes, it is probably ことにする (a decision with a start point). Does it describe something you try to do regularly? Then it is ようにする.

How to fix it: Write 10 sentences about your own life using each pattern. “I decided to quit coffee” = ことにした. “I try not to eat late at night” = ようにしている. Personal connection makes the distinction stick.

Grammar Mistake #3: Wrong Conditional Form

The mistake: Using たら, ば, と, or なら incorrectly, especially using と for one-time events or ば with commands.

The critical rules tested on N4:

• と cannot be used for one-time future events or with volitional main clauses (commands, requests, invitations). WRONG: 明日雨が降ると、映画を見ましょう. RIGHT: 明日雨が降ったら、映画を見ましょう.
• ば cannot be used with commands or requests in the main clause (in most cases). WRONG: 安ければ、買ってください. BETTER: 安かったら、買ってください.
• なら implies you just heard/learned something. It is contextual. WRONG: 毎日勉強するなら、上手になる (general truth). RIGHT: 日本に行くなら、この本がいいですよ (if you are going to Japan [responding to what you just heard]).
• たら is the safest default. It works in almost all situations and is the most commonly tested form on N4.

How to fix it: For the exam, if you are unsure, default to たら. It is correct in the widest range of contexts. Then eliminate wrong options: if the main clause is a command, eliminate と and ば. If the speaker is responding to new information, lean toward なら.

Grammar Mistake #4: Passive vs. Potential Confusion (られる)

The mistake: Confusing the passive form with the potential form for Group 2 (る) verbs, because they look identical.

The problem: For Group 2 verbs, both passive and potential use られる. 食べられる can mean “to be eaten” (passive) or “to be able to eat” (potential). Context determines meaning.

How to distinguish on the exam: Look at the particles. Passive sentences often use に to mark the agent (the person doing the action): 先生に褒められた = I was praised by the teacher. Potential sentences use が to mark the ability target: 日本語が話せる = I can speak Japanese. If you see に + person + られる, it is passive. If you see が + thing + られる, it is potential.

Grammar Mistake #5: てもいい vs たらいい Confusion

The mistake: Using てもいい (permission) when the question calls for たらいい (advice), or vice versa.

The difference:

• てもいいですか = May I? (asking permission). 写真を撮ってもいいですか = May I take a photo?
• たらいいですか = What should I do? (asking for advice). 何を買ったらいいですか = What should I buy?

How to fix it: If the sentence is a question about what action to take, it is たらいい. If the sentence is asking whether an action is allowed, it is てもいい. Practice by reading 20 question sentences and categorizing them as “permission” or “advice.”

Grammar Mistake #6: そうだ Appearance vs. そうだ Hearsay

The mistake: Using the wrong conjugation for appearance そうだ vs. hearsay そうだ, or confusing which meaning is intended.

The difference:

• Appearance そう = Looks like, seems like (based on what you see). Conjugation: い-adj stem + そう, な-adj stem + そう, verb stem + そう. おいしそうだ = It looks delicious. 雨が降りそうだ = It looks like it will rain.
• Hearsay そう = I heard that, apparently (based on what someone said). Conjugation: plain form + そうだ. おいしいそうだ = I heard it’s delicious. 雨が降るそうだ = I heard it will rain.

The critical conjugation difference: Appearance そう attaches to the stem (remove い from い-adjectives: おいし + そう). Hearsay そう attaches to the complete plain form (おいしい + そうだ). This is the detail the exam tests.

How to fix it: Create a comparison chart with 10 adjectives showing both forms. Drill until you can produce both forms in under 3 seconds. The conjugation rule is mechanical—once memorized, this mistake disappears.

Grammar Mistake #7: Misusing てしまう

The mistake: Only knowing てしまう as “regret” and missing its “completion” meaning, or using it in contexts where it sounds unnatural.

The two meanings:

• Completion: An action is done completely, thoroughly, entirely. 本を全部読んでしまった = I finished reading the entire book (neutral, emphasizing completion).
• Regret/unfortunate result: Something happened that the speaker wishes had not. 財布を忘れてしまった = I (unfortunately) forgot my wallet. ケーキを全部食べてしまった = I (regrettably) ate all the cake.

Exam context clue: If the situation is negative or undesirable, てしまう expresses regret. If the situation is neutral or positive and emphasizes thoroughness, てしまう expresses completion. The exam uses context to make one interpretation clearly correct.

Casual forms: てしまう contracts to ちゃう (te-form + chau) and でしまう to じゃう in casual speech. 食べちゃった = 食べてしまった. 飲んじゃった = 飲んでしまった. The exam may test recognition of these casual forms in listening.

Particle Mistake #8: に vs で (Location)

The mistake: Using に when で is required, or vice versa, for location contexts.

The rule:

• に marks the location of existence (where something/someone IS). 猫は部屋にいる = The cat is in the room. Used with いる, ある, 住む, 座る, 立つ, and similar “being/existing” verbs.
• で marks the location of action (where something HAPPENS). 部屋で勉強する = I study in the room. Used with action verbs: 食べる, 遊ぶ, 働く, 買う, etc.

The trap: Some sentences are ambiguous. 公園（　）走る. Is it に or で? Answer: で, because 走る (run) is an action. But 公園（　）犬がいる uses に because いる is an existence verb.

How to fix it: When you see a location + particle + verb question, classify the verb first. Is it an existence/position verb (いる, ある, 住む, 座る, 立つ, 泊まる)? Use に. Is it an action verb (everything else)? Use で. This rule covers 95% of cases.

Particle Mistake #9: に vs へ (Direction)

The mistake: Treating に and へ as completely identical for direction.

The subtle difference: Both can mark destination, but へ emphasizes the direction/journey while に emphasizes the destination/arrival point.

• 日本へ行く = I’m going toward Japan (emphasis on the journey, the direction).
• 日本に行く = I’m going to Japan (emphasis on arriving at Japan).

Exam relevance: In most N4 questions, both に and へ are acceptable for direction, and the exam will not offer both as choices for the same question. However, に has additional uses (time, indirect object, purpose) that へ does not. If the blank could be direction OR time OR purpose, に is the answer because へ only works for direction.

Example trap: 3時（　）学校（　）行きます。The first blank is に (time), the second could be に or へ (direction). If only に appears as an option for the second blank, that is correct.

Particle Mistake #10: は vs が in Complex Sentences

The mistake: Defaulting to は for every subject, even in subordinate clauses where が is required.

The rule that catches N4 learners: In subordinate clauses (before から, とき, ので, のに, けど, etc.), the subject is typically marked with が, not は.

• CORRECT: 雨が降ったとき、傘を持っていませんでした。(When it rained, I didn’t have an umbrella.)
• COMMON ERROR: 雨は降ったとき... (は sounds like you are contrasting rain with something else.)

Additional は vs が rules for N4:

• In relative clauses (noun-modifying clauses), use が: 私が作ったケーキ = the cake that I made.
• After question words, use が: だれが来ますか = Who is coming?
• With new information or focus, use が: あ、バスが来た！= Oh, the bus came!

How to fix it: When a sentence has two clauses, apply this check: is the subject in the subordinate clause (the clause with a conjunction at the end)? If yes, default to が. Use は only when you specifically intend to contrast or set a general topic.

Particle Mistake #11: を with Movement Verbs

The mistake: Not knowing that を can mark a place you pass through or leave, not just a direct object.

The N4 usage:

• Direct object (N5): りんごを食べる = eat an apple.
• Place of passage (N4): 公園を歩く = walk through the park. 橋を渡る = cross a bridge.
• Place of departure (N4): 家を出る = leave the house. 大学を卒業する = graduate from university.

Why it causes errors: Learners see a place + を and think it is wrong because を is supposed to mark objects. They change it to で or に, which changes the meaning or is grammatically incorrect. 公園を走る = run through the park. 公園で走る = run (exercise) at the park. Both are correct but mean different things.

Kanji Mistake #12: Ignoring Irregular Readings

The mistake: Applying standard on’yomi/kun’yomi rules to words that have special readings.

The most commonly tested irregular readings on N4:

How to fix it: Make a dedicated flashcard set for irregular readings. There are approximately 30-40 words at N4 level with non-standard readings. Memorize them as whole units (word + reading), not by trying to derive the reading from kanji rules.

Kanji Mistake #13: Confusing Look-Alike Kanji

The mistake: Selecting the wrong kanji because two kanji look visually similar.

Common N4 look-alike pairs:

• 待 (wait) vs 持 (hold): Only difference is the left radical (彳 vs 扌). 待つ = まつ (wait), 持つ = もつ (hold/have).
• 近 (near) vs 遠 (far): Not visually similar but often confused in meaning. Practice: 近い = ちかい, 遠い = とおい.
• 開 (open) vs 関 (related) vs 間 (between): All have the 門 radical. 開く = あく (open), 関係 = かんけい (relationship), 間 = あいだ (between).
• 特 (special) vs 持 (hold): Similar right component. 特に = とくに (especially), 持つ = もつ (hold).
• 以 (by means of) vs 似 (resemble): 以上 = いじょう (more than), 似る = にる (to resemble).

How to fix it: When you encounter a pair of similar-looking kanji, write them side by side and circle the exact stroke or radical that differs. Then create a mnemonic for each one. “待 has the ‘going person’ radical (彳) because you walk and WAIT; 持 has the ‘hand’ radical (扌) because you HOLD with your hand.”

Kanji Mistake #14: On’yomi vs Kun’yomi in Compounds

The mistake: Using the wrong reading type for a kanji compound.

The general rules:

• Two-kanji compounds (熟語): Usually on’yomi + on’yomi. 学校 = がっこう. 電話 = でんわ. 図書館 = としょかん.
• Kanji + okurigana (hiragana ending): Usually kun’yomi. 食べる = たべる. 大きい = おおきい. 新しい = あたらしい.
• Single kanji used as a word: Usually kun’yomi. 花 = はな. 山 = やま. 手 = て.

The exceptions: Some common compounds break the on-on rule: 大人 (おとな), 昨日 (きのう), 今朝 (けさ). These must be memorized individually. The exam loves testing these because they catch learners who rely on rules instead of actually knowing the words.

How to fix it: Learn the general rules, but always learn specific words with their actual readings. If your flashcards show the kanji and the reading together, you will learn the correct pronunciation naturally without needing to apply rules during the exam.

Kanji Mistake #15: Rendaku (Sequential Voicing) Blindness

The mistake: Not recognizing when a consonant changes in a compound word due to rendaku (連濁).

What rendaku is: When two words combine, the first consonant of the second word sometimes voices (becomes its dakuten version). h/f becomes b, k becomes g, t becomes d, s becomes z.

Common N4 rendaku examples:

• 花 (はな) + 火 (ひ) = 花火 (はなび) (fireworks)
• 手 (て) + 紙 (かみ) = 手紙 (てがみ) (letter)
• 一 (ひと) + 人 (ひと) = 一人 (ひとり) (one person) [irregular]
• 青 (あお) + 空 (そら) = 青空 (あおぞら) (blue sky)
• 毎 (まい) + 月 (つき) = 毎月 (まいつき　or まいげつ) [two readings]

How to fix it: You do not need to memorize rendaku rules. Instead, always learn compound words with their correct pronunciation from the start. If your flashcard for 手紙 shows てがみ (not てかみ), you will never be caught by rendaku on the exam because you learned the word correctly.

Time Management Mistake #16: Spending Too Long on Vocabulary Questions

The mistake: Spending 2-3 minutes on a vocabulary question you do not know, stealing time from reading comprehension where each question is worth the same points but requires much more time.

The math: The N4 vocabulary section has approximately 28 questions in about 30 minutes (allotted separately). However, many test-takers who finish vocabulary early have extra time for grammar+reading. The grammar+reading section (60 minutes for approximately 32 questions) is where time pressure actually kills scores.

The fix: Set a strict rule: maximum 60 seconds per vocabulary question. If you do not know the answer after 60 seconds, make your best guess and move on. A vocabulary question you spend 3 minutes on and still get wrong costs you 3 minutes AND the points. A vocabulary question you guess on in 30 seconds gives you 2.5 extra minutes for a reading question where careful analysis might earn you the points.

Time Management Mistake #17: Reading the Whole Passage Before the Questions

The mistake: Reading an entire 15-sentence passage from start to finish before looking at the questions, then having to re-read relevant sections to find answers.

Why it wastes time: You read 15 sentences but only 3-4 of them are relevant to the questions. You spent time processing 11 irrelevant sentences, and you may have forgotten the relevant details by the time you read the questions.

The fix: ALWAYS read the questions first. Then read the passage with specific targets in mind. This turns reading from a passive activity into an active search. You are looking for specific information, which is faster and more accurate than trying to absorb everything.

For longer passages with multiple questions, read all questions first, then read the passage paragraph by paragraph. After each paragraph, check if you can answer any of the questions. Move on to the next paragraph when you cannot.

Time Management Mistake #18: Not Practicing Under Timed Conditions

The mistake: Doing practice questions at your own pace and believing that you will somehow be faster on exam day.

The reality: You will be slower on exam day, not faster. Exam anxiety, unfamiliar environment, the pressure of the clock, and the cumulative fatigue of a 2+ hour exam all reduce your processing speed. If you barely finish practice tests at home with no time pressure, you will definitely run out of time in the actual exam.

The fix: Do at least 4 full-length timed practice tests in the 6 weeks before the exam. Each practice test should simulate real conditions: no phone, no dictionary, no breaks between sections, strict time limits. After each practice test, analyze not just your score but your time distribution. Did you spend too long on any section? Did you rush the last few questions?

Listening Mistake #19: Translating to English While Listening

The mistake: Mentally translating Japanese audio into English before processing the meaning. This creates a delay that causes you to miss the next sentence while you are still translating the previous one.

Why it happens: At N4 level, most learners have not developed direct comprehension in Japanese. They process through their native language as an intermediary. This works for reading (you can re-read) but fails catastrophically for listening (the audio does not pause).

The fix: Build direct Japanese-to-meaning connections through these methods:

• Shadowing: Repeat what you hear in Japanese immediately after hearing it. This prevents the translation pathway because you are producing Japanese output while receiving Japanese input. Your brain has no bandwidth left for translation.
• Picture associations: When you hear りんご, your brain should picture an apple, not process “ringo → apple.” Use image-based flashcards (picture on front, Japanese audio + text on back) instead of English-Japanese flashcards.
• Volume exposure: Listen to Japanese audio for at least 30 minutes daily, even passively. Podcasts during commute, Japanese radio while cooking, NHK while exercising. Volume builds automatic processing.

Listening Mistake #20: Not Pre-Reading Question Options

The mistake: Waiting for the audio to start before looking at the answer options, then scrambling to read options AND remember what you heard simultaneously.

The better approach: The N4 listening section gives you time between questions. Use every second of this time to read the next question’s options (when visible). In picture-based questions, analyze what differs between the four pictures. In text-based questions, read all four options and predict what the audio might discuss.

Pre-reading strategy by question type:

• Picture questions (もんだい1): During the introduction, look at all four pictures. Identify the variable (time? location? number? order of events?). When the audio plays, listen specifically for information about that variable.
• Key-point questions (もんだい2): The question is printed. Read it before the audio. This tells you exactly what to listen for. Ignore everything in the audio that does not relate to the question.
• Short utterance questions (もんだい3): Look at the situation picture. Predict what someone might say. Then listen and match.
• Quick response (もんだい4): No text is visible. Focus entirely on the audio. Listen to the last word/phrase of the prompt—it usually determines the category of correct response (question types pair with specific response types).

Practice Strategies: Fixing Mistakes Systematically

Knowing about these mistakes is not enough. You need a systematic approach to eliminate them from your exam performance.

The Error Journal Method

Keep a dedicated notebook (physical or digital) where you record every mistake you make during practice. For each entry, write:

1. The question (or a summary of it).
2. What you chose and why you chose it.
3. The correct answer and why it is correct.
4. The rule or pattern you need to remember.

Review this journal weekly. You will start to see patterns in your errors. Maybe you consistently confuse conditionals. Maybe particles trip you up only in subordinate clauses. These patterns tell you exactly where to focus your remaining study time.

One week before the exam, read through your entire error journal. This refreshes all the specific traps you have identified and primes your brain to watch for them during the actual test.