パスワード vs 暗証番号 vs PIN vs 認証コード: Japanese Password, Passcode, PIN, Verification Code, One-Time Password, and Login Security Words Explained

You open a Japanese banking app and the screen asks you for your 暗証番号（あんしょうばんごう）. You type in your email password. Nothing happens. A few seconds later: 暗証番号が間違っています。

Then an SMS arrives with a 認証コード（にんしょうコード）. You type that in the パスワード field. Still locked out.

Sound familiar? Japan’s login and security screens use a handful of words that all translate loosely to “code” or “password” in English — but each one refers to something completely different. Confusing them does not just slow you down; it can lock your account, block your card, or worse, leave you vulnerable to fraud. This guide gives you a clear, practical map of every security word you will encounter on Japanese apps, ATMs, and login screens.

Quick Answer — パスワード vs 暗証番号 vs PIN vs 認証コード

Before going into the details of each word, here is the short version that covers most situations you will encounter.

パスワード — Login Password

パスワード is the Japanese word for “password.” It refers to the alphanumeric string you create and control — the kind you type when logging into a website, app, or email account. パスワード can contain letters, numbers, and symbols. It is permanent until you change it yourself. You will see it on almost every Japanese login screen.

暗証番号 — Secret Passcode (Numeric)

暗証番号 literally means “secret identification number.” It is always numeric — typically four to six digits — and is used for physical security contexts: ATM cards, bank cards, building entry keypads, and device unlock screens. Think of it as your PIN in the Western banking sense. It is not used for website logins.

PIN / PINコード — Personal Identification Number

PIN (ピン) is used in Japanese tech and telecom contexts — your smartphone’s screen-lock PIN, your SIM card’s PIN, or the Windows Hello PIN. It overlaps significantly with 暗証番号 in meaning, but tends to appear in device and software UI rather than banking or physical security. In everyday Japanese speech, people often use 暗証番号 and PINコード interchangeably.

認証コード — Temporary Verification Code

認証コード is a temporary, system-generated code sent to your phone or email to verify your identity. It has nothing to do with a password you created — you receive it, type it once, and it expires. This is the code that arrives via SMS when you log into a banking app from a new device, or the code emailed to you when you register a new account.

Why English Speakers Mix These Up

In English, “password,” “PIN,” “code,” and “passcode” are used almost interchangeably in casual speech. Japanese draws hard lines between each concept. 暗証番号 is always numeric and belongs to physical/financial security. パスワード is always user-created and can contain any character. 認証コード is always temporary and system-sent. Once you understand these three axes — format (alphanumeric vs. numeric), origin (user-created vs. system-sent), and duration (permanent vs. temporary) — the distinctions become very clear.

Yuka

So when the ATM says 暗証番号を入力してください, I should type my 4-digit card PIN — not my online banking password, right?

Rei

Exactly right! 暗証番号 at an ATM always means the numeric PIN tied to your physical card. Your online banking パスワード is a completely different credential — never enter one where the other is expected.

What Does パスワード Mean?

パスワード as a Login Password

パスワード（パスワード）is a loanword from English “password” and carries almost exactly the same meaning. It is the credential you choose and set yourself when creating an account on a website, app, or service. Unlike 暗証番号, a パスワード is not restricted to numbers — it can include uppercase and lowercase letters, numbers, and special characters (特殊文字（とくしゅもじ）), and Japanese security guidelines increasingly require a mix of all three.

パスワード appears on nearly every Japanese digital service: shopping sites like Amazon Japan and Rakuten, social media platforms, email clients, corporate VPNs, and Wi-Fi networks. When a screen says パスワードを入力してください — “please enter your password” — it is asking for this alphanumeric, user-set credential.

パスワードを設定する / パスワードを変更する

Two of the most common パスワード actions you will see on Japanese sites:

パスワードを忘れた / パスワード再設定

The “Forgot password?” flow in Japanese uses specific vocabulary you should recognise:

• パスワードをお忘れの方 — “For those who have forgotten their password” (the link you click)
• パスワードを忘れました (パスワードをわすれました) — I forgot my password
• パスワードの再設定 (パスワードのさいせってい) — Password reset
• パスワード再設定メールを送る — Send a password reset email
• 新しいパスワードを設定してください — Please set a new password

Common Example Sentences

1. パスワードは8文字以上で設定してください。
Pasuwādo wa hachi moji ijō de settei shite kudasai.
Please set a password of at least 8 characters.

2. セキュリティのため、定期的にパスワードを変更してください。
Sekyuriti no tame, teikiteki ni pasuwādo wo henkō shite kudasai.
For security reasons, please change your password regularly.

3. パスワードを忘れた場合は、登録メールアドレスに再設定リンクをお送りします。
Pasuwādo wo wasureta baai wa, tōroku mēru adoresu ni saisetei rinku wo osendori shimasu.
If you have forgotten your password, we will send a reset link to your registered email address.

4. Wi-Fiのパスワードを教えてもらえますか？
Wi-Fi no pasuwādo wo oshiete moraemasu ka?
Could you tell me the Wi-Fi password?

What Does 暗証番号 Mean?

暗証番号 as a Secret Number

暗証番号（あんしょうばんごう）breaks down as: 暗 (dark / secret) + 証 (proof / identification) + 番号 (number). Literally, “secret identification number.” In practice it means a numeric-only security code used to verify your identity in physical or financial transactions.

The defining features of 暗証番号:

• Always numeric — no letters or symbols, typically 4 digits (sometimes 6)
• Used for physical/financial security — bank cards, ATMs, building entry systems, combination locks
• User-set and persistent — you set it when you receive your card and it stays the same until you change it
• Never shared — banks stress this constantly: 暗証番号を他人に教えないでください (do not tell others your PIN)

カードの暗証番号 / 銀行口座の暗証番号

The most common context for 暗証番号 is your bank card or credit/debit card. When you receive a new card in Japan, you register a 4-digit 暗証番号 at the branch or via a special setup process. This is the number you enter at:

• ATM（現金自動預払機 / ATM） — to withdraw or deposit cash
• コンビニATM — at 7-Eleven, Lawson, FamilyMart ATMs
• カード払い端末 — card payment terminals at shops (for non-contactless transactions)
• マンションのオートロック — apartment building keypad entry
• スマートフォンの画面ロック — numeric device unlock (when set as a number, not a pattern)

暗証番号を入力する / 暗証番号を忘れた

One important thing to know: if you enter the wrong 暗証番号 three times in a row at a Japanese ATM, your card is automatically locked (カードがロックされます). You will need to visit a bank branch in person to unlock it — this cannot be done over the phone or online.

Common Example Sentences

1. カードの暗証番号を入力してください。
Kādo no anshō bangō wo nyūryoku shite kudasai.
Please enter your card PIN.

2. 暗証番号は他人に絶対教えないでください。
Anshō bangō wa tanin ni zettai oshienaide kudasai.
Never tell your PIN to anyone else under any circumstances.

3. 暗証番号を忘れてしまった場合は、窓口（まどぐち）にお越しください。
Anshō bangō wo wasurete shimatta baai wa, madoguchi ni okoshi kudasai.
If you have forgotten your PIN, please come to the counter (bank branch).

4. このマンションのオートロックの暗証番号は何番ですか？
Kono manshon no ōto rokku no anshō bangō wa nanban desu ka?
What is the entry keypad code for this apartment building?

What Does PIN Mean in Japanese?

PIN / PINコード in Japanese UIs

PIN（ピン）and PINコード（ピンコード）appear primarily in technology and device contexts rather than banking. You will encounter them in Japanese smartphone setup screens, Windows Hello configuration, SIM card management, and app settings. While 暗証番号 is the vocabulary used by banks and ATM screens, device manufacturers and software developers tend to use the English abbreviation PIN directly — often in its Roman-alphabet form.

The distinction is subtle but real: if a Japanese ATM says enter your 暗証番号, that is banking language. If your Android phone setup says PINを設定する, that is tech-UI language. The underlying concept — a short numeric code to verify your identity — is the same.

スマホのPIN / SIM PIN / Windows PIN

二段階認証を設定する / 本人確認が必要です

Two related terms that often appear alongside PIN settings:

二段階認証（にだんかいにんしょう） — Two-step verification / Two-factor authentication (2FA). This is the security setting that requires you to enter both your password and a verification code when logging in. Many Japanese services — including online banking, Gmail Japan accounts, and LINE — offer or require this. You may also see the alternative term 二要素認証（にようそにんしょう）, which is the more technically precise term for two-factor authentication, though 二段階認証 is far more common in everyday Japanese UI.

本人確認（ほんにんかくにん） — Identity verification. This phrase appears when a service needs to confirm that you are who you say you are — often triggered when you try to access financial services, register for a new account, or change sensitive settings. You may be asked to submit a photo ID (本人確認書類（ほんにんかくにんしょるい）) or enter a verification code sent to your registered phone number.

コードを第三者に教えないでください — The Security Warning Pattern

One of the most important phrases you will encounter on Japanese security screens is a variant of:

このコードを第三者に教えないでください。
Kono kōdo wo daisan-sha ni oshienaide kudasai.
Do not share this code with anyone else.

第三者（だいさんしゃ）means “a third party” — literally “a third person,” meaning anyone who is not you or the system. Japanese banks, telecom companies, and app providers include this warning prominently because a major fraud pattern in Japan involves criminals calling targets, pretending to be bank staff, and asking for verification codes over the phone. Legitimate services will never call you and ask for your 認証コード or 暗証番号.

Yuka

I got a call from someone saying they were from my bank and asking for my 認証コード. Should I give it to them?

Rei

Absolutely not! This is a very common fraud tactic in Japan called 振り込め詐欺 (furikome sagi) or オレオレ詐欺 (ore-ore sagi). Legitimate banks will never ask for your 認証コード, 暗証番号, or パスワード over the phone. Hang up and call your bank directly using the number on your card.

What Does 認証コード Mean?

認証コード vs 確認コード vs 認証番号

Japanese services use several overlapping terms for temporary verification codes. Here is how they relate:

In practice, 認証コード and 確認コード are used interchangeably by most Japanese services for the same thing — a temporary numeric code sent to verify your identity. The difference is mostly stylistic: 認証 (authentication) emphasizes proving who you are, while 確認 (confirmation) emphasizes confirming an action. For everyday use, treat them the same way.

ワンタイムパスワード (OTP)

ワンタイムパスワード（ワンタイムパスワード）is the Japanese term for a one-time password (OTP) — a code that is valid for a single login or transaction only. It is more specific than 認証コード because it explicitly states the one-use nature.

Japanese online banking services use ワンタイムパスワード extensively. Two common formats:

• ハードウェアトークン — a physical key fob (token device) that generates a new OTP every 30–60 seconds. Common with major Japanese banks like 三菱UFJ (Mitsubishi UFJ) and 三井住友 (Sumitomo Mitsui).
• ソフトウェアトークン / アプリ認証 — an authenticator app (like Google Authenticator or bank-issued apps) that generates OTPs on your phone.
• SMS送信型OTP — an OTP sent by SMS for each transaction.

Example:
ワンタイムパスワードを入力してください。有効期限は3分です。
Wantaimu pasuwādo wo nyūryoku shite kudasai. Yūkō kigen wa san-pun desu.
Please enter your one-time password. It is valid for 3 minutes.

SMS認証 / メール認証 / アプリ認証

Japanese services describe how a verification code is delivered using these three terms:

• SMS認証（SMSにんしょう） — SMS authentication. A code is sent to your registered mobile number by text message. The most common method in Japan — used by banks, LINE, e-commerce sites, and government services (マイナポータル, etc.).
• メール認証（メールにんしょう） — Email authentication. A code or link is sent to your registered email address. Common for account registration and password reset flows.
• アプリ認証（アプリにんしょう） — App authentication. A code is generated by an authenticator app on your phone (TOTP — Time-based One-Time Password). Used by advanced users and corporate services.

認証コードが届かない — What To Do

認証コードが届かない（にんしょうコードがとどかない）means “the verification code has not arrived.” This is one of the most frustrating situations in Japanese digital life, especially for people with foreign phone numbers or carrier settings that block certain SMS senders. Here is the vocabulary for this situation:

• 認証コードが届かない — The verification code has not arrived
• 認証コードを再送する (さいそうする) — Resend the verification code
• SMSが受信できない — Cannot receive SMS
• 迷惑メールフォルダを確認する (めいわくメールフォルダをかくにんする) — Check the spam/junk folder
• 有効期限が切れました (ゆうこうきげんがきれました) — The code has expired
• コードの有効期限は〇分です — The code is valid for X minutes

If your SMS-based 認証コード is not arriving, the most common causes in Japan are: (1) your phone carrier’s spam filter is blocking the sender, (2) your phone has 海外SMS (international SMS) disabled, or (3) the service does not support foreign phone numbers. In this case, try the メール認証 option if available, or contact the service’s サポートセンター (support centre).

Common Example Sentences

1. ご登録の携帯番号に認証コードを送信しました。
Gotōroku no keitai bangō ni ninshō kōdo wo sōshin shimashita.
We have sent a verification code to your registered mobile number.

2. 認証コードの有効期限は10分です。
Ninshō kōdo no yūkō kigen wa juppun desu.
The verification code is valid for 10 minutes.

3. 認証コードを第三者に教えないでください。当社が電話でお聞きすることはありません。
Ninshō kōdo wo daisan-sha ni oshienaide kudasai. Tōsha ga denwa de okiki suru koto wa arimasen.
Do not share your verification code with anyone. We will never ask for it over the phone.

4. 認証コードが届かない場合は、「コードを再送する」をタップしてください。
Ninshō kōdo ga todokanai baai wa, “kōdo wo saisō suru” wo tappu shite kudasai.
If the verification code has not arrived, tap “Resend code.”

5. 二段階認証を設定すると、セキュリティが大幅に向上します。
Nidankai ninshō wo settei suru to, sekyuriti ga ōhaba ni kōjō shimasu.
Setting up two-step verification significantly improves your security.

Common Mistakes English Speakers Make

Calling Every Code パスワード

The single most common mistake: using パスワード as a catch-all for every type of security code. In English, “password” is often used loosely for PINs, passcodes, and access codes. In Japanese, this is incorrect and can cause real confusion — especially when dealing with bank staff, tech support, or filling out security-related forms. Use パスワード only for a user-created alphanumeric login credential.

❌ Wrong: ATMで使うパスワードを忘れました。(for your bank card PIN)
✅ Correct: ATMで使う暗証番号を忘れました。

Confusing 認証コード and パスワード

A common second mistake: typing a 認証コード (a 6-digit temporary code from SMS) into the パスワード field. The two fields appear on the same screen during a two-step login, and new learners sometimes swap them. Remember: パスワード = what you set and remember; 認証コード = what the system sends to you and expires quickly.

Confusing 暗証番号 and 認証番号

These two words look and sound similar but mean very different things:

• 暗証番号（あんしょうばんごう） — Your permanent, user-set PIN (bank card, ATM)
• 認証番号（にんしょうばんごう） — A temporary, system-sent verification number

The key difference is in the first character: 暗（dark/secret）vs 認（recognize/authenticate）. If you are standing at an ATM, the screen wants 暗証番号 — your permanent PIN. If you are logging into an app and received a code by SMS, that code is a 認証番号 or 認証コード.

Sharing 認証コード with Others (Fraud Warning)

This is not just a language mistake — it is a safety issue. Japan has a significant problem with telephone fraud (振り込め詐欺（ふりこめさぎ）— “transfer fraud,” also called 特殊詐欺（とくしゅさぎ）— “special fraud”). Fraudsters call people pretending to be bank staff, NTT Docomo support, or government offices, and ask for verification codes to “confirm the account.” If you ever receive a call or message asking for your 認証コード, 暗証番号, or パスワード — do not share it. Hang up and contact the organisation directly.

Missing Code Expiration

認証コード and ワンタイムパスワード are time-limited. Many English speakers, used to email-based verification links that stay valid for 24 hours, are caught off guard when a Japanese service’s SMS code expires after 3–5 minutes. Always enter the code immediately after receiving it. If you see 有効期限が切れました（ゆうこうきげんがきれました）— “the code has expired” — simply request a new one by clicking 再送（さいそう）or コードを再送する.

Decision Rule: Which Security Word Should You Use?

Not sure which word to use? Follow this flowchart:

Is the code PERMANENT (set by you, stays until you change it)?
│
├── YES → Is it letters/numbers/symbols?
│         ├── YES → パスワード
│         └── NO (numbers only) → 暗証番号 (banking/ATM/physical)
│                              → PINコード (device/tech context)
│
└── NO (temporary / system-sent / expires soon)
          ├── Does it expire after ONE use? → ワンタイムパスワード (OTP)
          ├── Sent by SMS/email to confirm identity? → 認証コード / 確認コード
          └── Used as part of 2-step login? → 二段階認証コード

Here is a side-by-side summary table to bookmark:

Quick Quiz

Test what you have learned. Choose the correct word for each situation.

1. You are at a Japanese ATM and the screen asks you to enter your 4-digit bank card code. What Japanese word describes this code?
(a) パスワード　　(b) 認証コード　　(c) 暗証番号　　(d) ワンタイムパスワード

2. You just created a new account on a Japanese shopping site. The site emailed you a 6-digit code that expires in 10 minutes to confirm your email address. What is this code called?
(a) 暗証番号　　(b) 確認コード　　(c) パスワード　　(d) 二段階認証

3. Fill in the blank: セキュリティのため、________ を定期的に変更してください。
(The sentence means: “For security reasons, please change your ________ regularly.”)
Answer: パスワード — because this refers to a user-created login credential that can be changed.

4. A stranger calls and says they are from your bank and asks for your 認証コード. What should you do?
(a) Give it to them — it is just a temporary code　　(b) Hang up — this is fraud
(c) Give them your パスワード instead　　(d) Send it by SMS

5. Your phone’s lock screen asks you to enter a 6-digit numeric code you set when you first got the phone. In Japanese device settings, this is called a ________.
(a) 認証コード　　(b) パスワード　　(c) PIN / PINコード　　(d) ワンタイムパスワード

6. Complete the sentence: 認証コードが________ 場合は、「コードを再送する」をタップしてください。
(The sentence means: “If the verification code has not ________, tap ‘Resend code.'”)
Answer: 届かない (todokanai) — has not arrived.

Quiz Answers: 1-(c)　2-(b)　3-パスワード　4-(b)　5-(c)　6-届かない

Want to practise using these words in real conversation with a native Japanese speaker? iTalki connects you with Japanese teachers and conversation partners for online lessons at every level. Working through a real login screen or ATM scenario with a native speaker is one of the fastest ways to make this vocabulary stick.

Have you ever been locked out of a Japanese ATM or confused by a verification screen? Leave a comment below and share your experience — or ask if you have a specific security word you are not sure about!

Keep Learning

If you found this guide useful, these related articles cover more Japanese vocabulary you will need for technology, daily digital life, and workplace situations in Japan:

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