5.1 Cause, Reason & Consequence (〜おかげで, 〜せいで, 〜によって, 〜につき, 〜ばかりに)

5.1 Cause, Reason & Consequence (理由・原因・結果)

At the elementary level (JLPT N5 and N4), expressing cause and effect is largely confined to two universal conjunctions: the subjective, speaker-oriented から (kara) and the objective, polite, social ので (node). While these basic conjunctions convey raw factual causality ("Because X happened, Y occurred"), they carry minimal emotional texture or pragmatic specialization.

At the intermediate JLPT N3 level, Japanese splits causality across two sophisticated linguistic dimensions:

1. Psychological & Affective Attribution: Grammar patterns that embed the speaker's emotional reaction toward the cause—such as heartfelt gratitude (〜おかげで), bitter resentment or external blame (〜せいで), or catastrophic retrospective regret (〜ばかりに).
2. Objective, Register-Specific Causality: Grammar patterns engineered for formal written documents, public bulletins, newspaper journalism, and administrative notifications (〜によって, 〜につき).

Understanding these nuanced grammatical constraints is vital for mastering the Language Knowledge section (Bunpō Mondai 1 & 2) and navigating reading comprehension passages (Dokkai).

┌────────────────────────────────────────────────────────────────────────┐
│               INTERMEDIATE CAUSALITY SPECTRUM (N3)                     │
├──────────────────┬──────────────────────┬──────────────────────────────┤
│ Grammar Pattern  │ Emotional Polarity   │ Primary Discourse Domain     │
├──────────────────┼──────────────────────┼──────────────────────────────┤
│ 〜おかげで       │ Positive / Gratitude │ Interpersonal / Narrative    │
│ 〜せいで / せいか│ Negative / Blame     │ Interpersonal / Evaluative   │
│ 〜ばかりに       │ Severe Regret / Loss │ Personal Reflection / Drama  │
│ 〜によって       │ Neutral / Objective  │ News / Academic / Formal     │
│ 〜につき         │ Formal / Official    │ Signboards / Public Notices  │
└──────────────────┴──────────────────────┴──────────────────────────────┘

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1. Gratitude & Positive Consequence: 〜おかげで / 〜おかげだ

Core Meaning & Nuance

〜おかげで (okage de) translates into English as "thanks to..." or "owing to the beneficial influence of...". It expresses the speaker's heartfelt gratitude, relief, or appreciation that a favorable event, effort, or external condition in Clause 1 (Cause) produced a desirable, positive outcome in Clause 2 (Consequence).

Syntactic Connection Rules

The particle de attaches to the plain (informal) attributive form of verbs, adjectives, and nouns:

┌───────────────────────┬────────────────────────────────────────────┐
│ Grammatical Category  │ Connection Formula                         │
├───────────────────────┼────────────────────────────────────────────┤
│ Verbs (動詞)          │ Plain Form (辞書形 / た形 / ない形) + おかげで │
│ い-Adjectives (い形容詞)│ Plain Form (〜い / 〜かった) + おかげで    │
│ な-Adjectives (な形容詞)│ Stem + な / だった + おかげで             │
│ Nouns (名詞)          │ Noun + の / だった + おかげで              │
└───────────────────────┴────────────────────────────────────────────┘

When concluding a sentence directly with this construction, the copula form 〜おかげだ (okage da) or polite 〜おかげです (okage desu) is used: [Positive Result] は、[Beneficial Cause] のおかげだ.

Exemplary Sentences

• 先生が熱心にご指導くださったおかげで、無事にN3試験に合格することができました。<br>Sensei ga nesshin ni goshidō kudasatta okage de, buji ni N3 shiken ni gōkaku suru koto ga dekimashita.<br>(Thanks to the teacher's passionate guidance, I was able to pass the N3 exam without a hitch.)
• 毎日薬をきちんと飲んでいるおかげで、体調がすっかり良くなりました。<br>Mainichi kusuri o kitchiri nonde iru okage de, taichō ga sukkari yoku narimashita.<br>(Thanks to taking my medicine properly every day, my physical condition has completely recovered.)
• 最新の医療技術のおかげで、多くの人命が救われている。<br>Saishin no iryō gijutsu no okage de, ōku no jinmei ga sukuwarete iru.<br>(Owing to cutting-edge medical technology, many human lives are being saved.)

Critical Exam Trap: Sarcasm & Irony (皮肉・ひにく)

While standard usage requires a positive outcome, native speakers frequently deploy 〜おかげで with biting sarcasm (皮肉, hiniku) to emphasize how someone's blunder, carelessness, or unsolicited interference ruined a situation:

• お前が余計なことを言ったおかげで、話がややこしくなってしまったじゃないか。<br>Omae ga yokei na koto o itta okage de, hanashi ga yayakoshiku natte shimatta ja nai ka.<br>("Thanks" to you saying something completely unnecessary, the whole situation got complicated, didn't it!)
• 朝の電車の遅延のおかげで、大事な会議に遅刻してしまった。<br>Asa no densha no chien no okage de, daiji na kaigi ni chikoku shite shimatta.<br>("Thanks" to the morning train delay, I ended up late to an important meeting.)

JLPT Rule of Thumb: On the JLPT, if the sentence context describes sincere human effort and a joyful accomplishment, choose 〜おかげで. If it describes a neutral natural law, use 〜によって instead.

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2. Blame, Fault & Negative Consequence: 〜せいで / 〜せいか / 〜せいだ

Core Meaning & Nuance

〜せいで (sei de) translates as "because of...", "due to the fault of...", or "on account of (a negative factor)...". It explicitly pins the blame for an undesirable, unfortunate, or disastrous outcome on a specific person, external circumstance, or mistake.

Syntactic Connection Rules

The morphological connections for 〜せいで are identical to those of 〜おかげで:

┌───────────────────────┬────────────────────────────────────────────┐
│ Grammatical Category  │ Connection Formula                         │
├───────────────────────┼────────────────────────────────────────────┤
│ Verbs (動詞)          │ Plain Form (辞書形 / た形 / ない形) + せいで │
│ い-Adjectives (い形容詞)│ Plain Form (〜い / 〜かった) + せいで      │
│ な-Adjectives (な形容詞)│ Stem + な / だった + せいで               │
│ Nouns (名詞)          │ Noun + の / だった + せいで                │
└───────────────────────┴────────────────────────────────────────────┘

Sentence-final form: [Negative Result] は、[Blamed Cause] のせいだ.

Sibling Pattern: 〜せいか (Uncertain or Softened Cause)

When the speaker suspects a particular cause for an undesirable condition but lacks 100% certainty, attaching the question particle か (ka) creates 〜せいか (sei ka), meaning "perhaps because of..." or "maybe owing to...":

• 昨夜エアコンをつけたまま寝たせいか、今朝から少し喉が痛い。<br>Sakuya eakon o tsuketa mama neta sei ka, kesa kara sukoshi nodo ga itai.<br>(Perhaps because I slept with the air conditioner on last night, my throat has been hurting a bit since this morning.)
• 歳のせいか、最近小さな文字が読みにくくなってきた。<br>Toshi no sei ka, saikin chiisana moji ga yominikuku natte kita.<br>(Maybe due to my age, reading small print has become difficult lately.)

Exemplary Sentences

• 昨夜夜更かしをしたせいで、今日の授業中に居眠りをして怒られた。<br>Sakuya yofukashi o shita sei de, kyō no jugyō-chū ni inemuri o shite okorareta.<br>(Because of staying up late last night, I dozed off during class today and got scolded.)
• 連日の大雨のせいで、楽しみにしていた週末のサッカーの試合が中止になった。<br>Renjitsu no ōame no sei de, tanoshimi ni shite ita shūmatsu no sakkā no shiai ga chūshi ni natta.<br>(Due to the consecutive days of heavy rain, the weekend soccer match we were looking forward to was canceled.)
• あいつが約束の時間を守らなかったせいで、全員のスケジュールが狂ってしまった。<br>Aitsu ga yakusoku no jikan o mamoranakatta sei de, zen'in no sukejūru ga kurutte shimatta.<br>(Because that guy failed to keep his promised time, everyone's schedule was thrown into chaos.)

┌────────────────────────────────────────────────────────────────────────┐
│                    POLARITY OPPOSITION IN N3                           │
├────────────────────────────────────────────────────────────────────────┤
│  Beneficial Cause ───> [ 〜おかげで ] ───> Positive / Joyful Outcome   │
│  Harmful Cause    ───> [ 〜せいで   ] ───> Negative / Regrettable Result│
│  Uncertain Cause  ───> [ 〜せいか   ] ───> Mild Negative Symptom/State │
└────────────────────────────────────────────────────────────────────────┘

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3. Objective Cause, Means & Diversity: 〜によって / 〜による

〜によって (ni yotte) is one of the most versatile and high-yield compound particles on the JLPT N3. It belongs to formal, written, expository, and journalistic Japanese (kōshiki bunshō). It attaches strictly to Nouns (Noun + によって). When modifying a subsequent noun directly, it shifts to the adnominal form 〜による + Noun (ni yoru + Noun).

In N3, 〜によって tests four distinct semantic functions:

┌────────────────────────────────────────────────────────────────────────┐
│                     THE 4 FUNCTIONS OF 〜によって                      │
├──────────────────┬─────────────────────────────────────────────────────┤
│ 1. Cause/Reason  │ Formal, non-emotional cause of objective events     │
│ 2. Means/Method  │ Method, tool, or medium used to achieve an action   │
│ 3. Diversity     │ Variation/dependence: "depending on / varies by"    │
│ 4. Passive Agent │ Human creator, author, or inventor in passive voice │
└──────────────────┴─────────────────────────────────────────────────────┘

Function 1: Formal Cause / Reason (原因・理由)

• Nuance: Indicates an objective, non-volitional cause that triggered a physical event, disaster, social change, or phenomenon. Unlike せいで, it maintains emotional neutrality and journalistic detachment.
• Example: 今朝発生した大規模な地震によって、市内の交通網が麻痺している。<br>Kesa hassei shita daikibo na jishin ni yotte, shinai no kōtsūmō ga mahi shite iru.<br>(Due to the large-scale earthquake that occurred this morning, the city's transit network is paralyzed.)
• Noun Modifier Form (〜による): 台風による停電が各地で相次いでいる。<br>Taifū ni yoru teiden ga kakuchi de aitsuide iru.<br>(Power outages caused by the typhoon are occurring in succession across various regions.)

Function 2: Means / Method / Tool (手段・方法)

• Nuance: Indicates the instrument, mechanism, technique, or medium employed to accomplish a goal ("by means of / through / via").
• Example: インターネットの普及によって、世界中の情報を瞬時に得ることができるようになった。<br>Intānetto no fukyū ni yotte, sekaijū no jōhō o shunji ni eru koto ga dekiru yō ni natta.<br>(Through the spread of the internet, we have become able to obtain information from around the world instantaneously.)
• Example: 定期的なアンケート調査によって、利用者の満足度を測定する。<br>Teikiteki na ankēto chōsa ni yotte, riyōsha no manzokudo o sokutei suru.<br>(We measure user satisfaction by means of regular questionnaire surveys.)

Function 3: Diversity / Dependency (多様性・依存「〜によって異なる」)

• Nuance: Expresses that properties, outcomes, customs, or reactions vary according to the category, individual, or situation ("depending on..."). Frequently pairs with verbs of difference such as 異なる (kotonaru, to differ), 違う (chigau, to vary), or 変わる (kawaru, to change).
• Example: 文化や習慣は、国や地域によって大きく異なる。<br>Bunka ya shūkan wa, kuni ya chiiki ni yotte ōkiku kotonaru.<br>(Culture and customs differ greatly depending on the country and region.)
• Example: 人によって物事の捉え方や感じ方は様々だ。<br>Hito ni yotte monogoto no toraekata ya kanjikata wa samazama da.<br>(Ways of perceiving and feeling about things vary depending on the individual.)

Function 4: Agent in Passive Constructions (受動態の動作主)

• Nuance: Marks the specific human creator, author, artist, architect, or inventor in passive sentences describing historical achievements, literature, or discoveries.
• Example: この不朽の名作小説は、夏目漱石によって書かれた。<br>Kono fukyū no meisaku shōsetsu wa, Natsume Sōseki ni yotte kakareta.<br>(This timeless masterpiece novel was written by Natsume Soseki.)
• Example: ダイナマイトはノーベルによって発明された。<br>Dainamaito wa Nōberu ni yotte hatsumei sareta.<br>(Dynamite was invented by Nobel.)

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4. Formal Notices & Public Announcements: 〜につき

Core Meaning & Nuance

〜につき (ni tsuki) is a specialized administrative and business postposition used primarily in written public signage, business correspondence, notices, and formal posters. It attaches directly to concise Nouns to state the official administrative reason for an operational suspension, restriction, closure, or change.

┌────────────────────────────────────────────────────────────────────────┐
│                     TWO FACETS OF 〜につき IN N3                       │
├────────────────────────────────────────────────────────────────────────┤
│ 1. Reason in Public Signs  : Noun + につき (Due to [Reason]...)         │
│    例: 工事中につき立入禁止 (Keep out due to construction in progress)  │
│                                                                        │
│ 2. Unit Proportion / Ratio : Noun (Counter) + につき (Per [Unit]...)    │
│    例: 1名につき500円 (500 yen per person)                              │
└────────────────────────────────────────────────────────────────────────┘

Connection Formula

• Noun + につき (Typically Sino-Japanese verbal nouns or compact state nouns: 清掃中, 改装中, 雨天, 人手不足).

Exemplary Sentences

• ただいま店内改装中につき、本日の営業は午後5時で終了とさせていただきます。<br>Tadaima tennai kaisō-chū ni tsuki, honjitsu no eigyō wa gogo goji de shūryō to sasete itadakimasu.<br>(Due to store renovations currently underway, today's business operations will conclude at 5:00 PM.)
• 雨天につき、本日の野外フェスティバルは明日に延期いたします。<br>Uten ni tsuki, honjitsu no yagai fesutibaru wa asu ni enki itashimasu.<br>(On account of rainy weather, today's outdoor festival is postponed until tomorrow.)
• エレベーター点検中につき、階段をご利用ください。<br>Erebētā tenken-chū ni tsuki, kaidan o goriyō kudasai.<br>(Due to elevator inspection, please use the stairs.)

Exam Trap: 〜につき is rarely used in spoken conversational Japanese between friends. If an exam dialogue depicts two friends chatting at a cafe, 〜につき is almost certainly a distractor for 〜から or 〜ので.

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5. Sole Regrettable Cause & Disastrous Consequence: 〜ばかりに

Core Meaning & Nuance

〜ばかりに (bakari ni) translates as "simply because...", "solely on account of...", or "just because of (one fatal flaw/action)...". It carries an intense emotional undertone of deep retrospective remorse (後悔, kōkai), bitterness, or tragedy.

It conveys that a single, seemingly minor, careless, or unfortunate action/condition in Clause 1 served as the sole catalyst for an unusually severe, disproportionate, or disastrous negative consequence in Clause 2.

┌────────────────────────────────────────────────────────────────────────┐
│                     ANATOMY OF 〜ばかりに                              │
├────────────────────────────────────────────────────────────────────────┤
│ [Minor Action / Trivial Lie / Momentary Slip] (Clause 1)               │
│                             │                                          │
│                             ▼  (Sole Catalyst)                         │
│                     【 〜ばかりに 】                                    │
│                             ▼                                          │
│ [Disastrous / Irreversible Negative Outcome] (Clause 2)                │
│                             │                                          │
│  Speaker Stance: "If only I hadn't done that! What a terrible price!"  │
└────────────────────────────────────────────────────────────────────────┘

Syntactic Connection Rules

┌───────────────────────┬────────────────────────────────────────────┐
│ Grammatical Category  │ Connection Formula                         │
├───────────────────────┼────────────────────────────────────────────┤
│ Verbs (動詞)          │ Plain Form (辞書形 / た形 / ない形) + ばかりに │
│ い-Adjectives (い形容詞)│ Plain Form (〜い / 〜かった) + ばかりに    │
│ な-Adjectives (な形容詞)│ Stem + な / である + ばかりに              │
│ Nouns (名詞)          │ Noun + である + ばかりに                   │
└───────────────────────┴────────────────────────────────────────────┘

Crucial Syntactic Constraints

1. Mandatory Negative Outcome: Clause 2 must express a painful, damaging, or regrettable state. It can never describe a happy or positive outcome.
2. No Volitional Requests/Commands: The speaker cannot express their own immediate intent, orders, or suggestions in Clause 2 (*〜てください, *〜ましょう, *〜つもりだ are forbidden).
3. Subjective Remorse: The speaker emphasizes that the result was an excruciating price to pay for the cause.

Exemplary Sentences

• あのとき本当のことを言わなかったばかりに、親友との信頼関係を完全に失ってしまった。<br>Ano toki hontō no koto o iwanakatta bakari ni, shin'yū to no shinrai kankei o kanzen ni ushinatte shimatta.<br>(Just because I did not tell the truth back then, I completely lost the trust of my best friend.)
• お金がないばかりに、行きたかった大学への進学を諦めざるを得なかった。<br>Okane ga nai bakari ni, ikitakatta daigaku e no shingaku o akiramezaru o enakatta.<br>(Simply because I had no money, I had no choice but to give up going to my university of choice.)
• 車の鍵をかけ忘れたばかりに、車内の貴重品をごっそり盗まれてしまった。<br>Kuruma no kagi o kakewasureta bakari ni, shanai no kichōhin o gossori nusumarete shimatta.<br>(Solely because I forgot to lock the car, all the valuables inside were completely stolen.)

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6. Master Comparison Matrix: N3 Causality Patterns

The following master table synthesizes the five core cause-and-effect structures tested in Section 5.1:

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7. Fast Test-Day Elimination Strategy for Cause/Reason Questions

When confronting a cause-and-effect question in Mondai 1 or Mondai 2, apply this three-step decision tree:

Step 1: Check Clause 2 Polarity & Emotion
  ├─ Positive outcome with gratitude? ───> Choose 〜おかげで
  ├─ Negative outcome with blame? ───────> Choose 〜せいで
  ├─ Catastrophic regret / remorse? ─────> Choose 〜ばかりに
  └─ Pure neutral fact / no emotion? ────> Proceed to Step 2

Step 2: Check the Syntactic Category Preceding the Blank
  ├─ Preceded by a concise NOUN in a sign/notice? ───> Choose 〜につき
  ├─ Preceded by a NOUN marking means or cause? ────> Choose 〜によって
  └─ Preceded by a Verb/Adjective Plain form? ───────> Eliminate 〜によって / 〜につき

Step 3: Verify Sentence Ending Constraints
  └─ Ensure no requests (〜てください) follow 〜ばかりに or objective 〜によって.