Bitwardenの使い方：2026年にパスワードを簡単に管理する方法

クイックスタート

このガイドでは、Bitwardenのすべての機能について解説します。

• はじめる — Create your account and set up the apps
• パスワードジェネレーターの使い方 — Builds random passwords with rules you set, then saves them straight to your vault.
• データインポーターの使い方 — Pulls passwords out of another manager and drops them into your vault.
• Export Vault の使い方 — Writes a backup copy of your vault to a file you keep offline.
• レポートの使い方 — Scans your saved logins and flags the ones worth changing first.
• カスタムドメインの使用方法 — Groups related domains so one saved login works across all of them.

所要時間： 各作品につき5分

このガイドには以下の内容も含まれています。 プロのヒント | よくある間違い | トラブルシューティング | 価格 | 代替案

このガイドを信頼する理由

I have used Bitwarden as my daily password manager for over two years. Every screen below comes from my own vault, across the desktop app, the browser extensions and アンドロイド.

Bitwarden is one of the few password manager tools that stays genuinely usable on a free plan.

But most users stop at saving passwords and never touch the rest.

This guide shows you how to use Bitwarden feature by feature.

Step by step, with screenshots and tips from real use.

Bitwardenチュートリアル

This How to Use Bitwarden tutorial walks through setup first, then each tool inside the vault.

Bitwarden の利用開始

Do this one-time setup before anything else.

約3分かかります。

ステップ1：アカウントを作成する

Visit the Bitwarden website and click Get Started.

Enter your email, then create a master password you have never used anywhere else.

The master password in Bitwarden is unique and cannot be recovered if lost, so write the hint carefully.

✓ チェックポイント: チェックしてください 受信トレイ 確認メールについて。

Step 2: Download the Apps You Need

Users can download the Bitwarden desktop application from its official website. Bitwarden supports Windows, macOS, and Linux for desktop applications, and one vault syncs across all three platforms.

Users can install the Bitwarden browser extension from the Chrome Web Store, and Bitwarden supports browser extensions for Chrome, Edge, Firefox, Safari, Opera, Brave, Vivaldi, Tor and DuckDuckGo.

Bitwarden has official apps for both iOS and Android, so your vault travels with you on mobile.

Here is what my own setup looks like:

✓ チェックポイント: You are signed in and the main dashboard loads.

Step 3: Turn On Two-Step Login

Open Settings, then 安全, then Two-step Login in the Web Vault.

You can set up two-step login in Bitwarden to enhance security by requiring verification from another device.

Bitwarden supports various 2FA methods, including authenticator apps, email codes, and hardware keys like YubiKeys.

Bitwardenパスワードジェネレーターの使い方

パスワード ジェネレータ lets you create a strong, random password for every new login item instead of reusing old ones.

以下に、その使用方法をステップごとに説明します。

ステップ1：ジェネレーターを開く

Click the Bitwarden extension icon, then open the Generator tab.

The desktop app and mobile apps use the same tab.

ステップ2：パスワードルールを設定する

Pick a length, then toggle numbers, symbols and capital letters.

Bitwarden allows users to generate strong passwords with customizable parameters.

これは以下のようなものです。

✓ チェックポイント: A fresh password appears in the box each time you tap the refresh arrow.

Step 3: Save It to a Login Item

Copy the result, then paste it into the site’s sign-up form.

Save the credentials as a new login item so autofill passwords works next visit.

Bitwardenデータインポーターの使い方

データ Importer lets you move every saved password out of your old password manager and into your Web Vault in one pass.

以下に、その使用方法をステップごとに説明します。

ステップ1：以前のマネージャーからエクスポートする

Open your old tool and export the file, usually as CSV or JSON.

Chrome, Edge and Safari can export their stored passwords too.

Step 2: Open Import Data in the Web Vault

The Import Tool in the Web Vault allows users to import passwords from other managers.

Pick your old manager from the format list so the columns map correctly.

これは以下のようなものです。

✓ チェックポイント: Your vault items appear with folders matching the old structure.

Step 3: Run the Import and Check It

Upload the file, then click Import Data and open My Vault.

Bitwarden Export Vault の使い方

エクスポート保管庫 lets you keep your own encrypted backup of every vault item on a device you control.

以下に、その使用方法をステップごとに説明します。

Step 1: Open the Export Screen

In the Web Vault, open Tools, then select Export Vault.

Step 2: Pick the Encrypted File Type

Choose the password protected export, not the plain JSON or CSV type.

Set a file password you can remember, since it is separate from your master password.

これは以下のようなものです。

✓ チェックポイント: The download completes and the file opens as scrambled text, not readable logins.

Step 3: Verify and Store the File

Open the file once to check it downloaded, then move it to offline storage.

Bitwardenレポートの使い方

レポート lets you spot weak, reused or exposed passwords before somebody else does.

以下に、その使用方法をステップごとに説明します。

Step 1: Open Reports in the Web Vault

Bitwarden provides security reports identifying weak, reused, or exposed passwords.

The full set of security reports sits inside premium accounts.

Step 2: Run the Exposed Passwords Check

Select the report, then let it compare your data against known breach lists.

これは以下のようなものです。

✓ チェックポイント: Each report shows a count and a list of the affected accounts.

Step 3: Fix What It Flags

Open each flagged login item and replace the password with a generated one.

Bitwardenのカスタムドメインの使い方

カスタムドメイン lets you teach Bitwarden which web addresses belong to the same service so autofill stops missing them.

以下に、その使用方法をステップごとに説明します。

Step 1: Open Domain Rules

In the Web Vault, open Settings, then choose Domain Rules.

Step 2: Add Your Domains to a Group

Create a custom group and type each domain the service uses.

For example, a login domain and a checkout domain often differ by one word.

これは以下のようなものです。

✓ チェックポイント: The extension suggests the same saved credentials on every domain in the group.

Step 3: Test It on Both Sites

Visit each domain and check that the login form is filled automatically.

Bitwardenのプロ向けヒントとショートカット

These are the habits that saved me the most time after two years of daily use.

キーボードショートカット

アクション	ショートカット
Open the browser extension	Ctrl + Shift + Y (Cmd + Shift + Y)
Automatically fill the current login	Ctrl + Shift + L (Cmd + Shift + L)
Generate a password and copy it	Ctrl + Shift + 9
Add a new login item in the desktop app	Ctrl + N (Cmd + N)

ほとんどの人が見逃す隠れた機能

• Bitwarden 送信: Bitwarden Send allows users to share sensitive information via a password-protected, encrypted link that expires on your schedule.
• Biometric unlock: Users can unlock Bitwarden using biometric methods, so a face or fingerprint replaces typing the master password.
• Launch button: You can launch a website directly from Bitwarden by selecting the Launch button in any vault item with a valid URI.
• Multiple accounts on mobile: To log in to multiple Bitwarden accounts on the mobile app, select the currently logged-in account and choose Add Account.
• Idle locking: Users can configure vault locking upon system idle or browser closure for additional security.

Bitwardenでよくある間違いを避ける方法

Mistake #1: Treating the Master Password Like Any Other Password

Mistake #2: Leaving the Browser Password Manager Switched On

間違いその3：二段階認証を省略する

Bitwardenのトラブルシューティング

Problem: Autofill Does Nothing on Android

原因： The Android accessibility or autofill service is switched off for the app.

修理： To enable autofill in Bitwarden on Android, open the app, tap the Settings tab, and toggle the Autofill Services option. Once autofill is set up, logging into an app or website using Bitwarden is simple by tapping the email/username or password input box.

Problem: Imported Items Are Missing or Unsorted

原因： The export format did not match the type you picked during the import.

修理： Re-export from the old tool, then repeat the import with the exact source selected. You can create a folder in Bitwarden to organize your vault items by selecting the Settings tab and then Vault.

Problem: You Cannot Log In From a New Device

原因： Two-step login is asking a device you no longer carry to verify the sign-in.

修理： Use a saved recovery code, or log in from a browser you already trust and change the 2FA method.

📌 注記： If none of these fix your issue, open a support ticket with Bitwarden. In that case, premium accounts get priority customer support.

Bitwarden とは何ですか?

ビットワーデン is a password manager that stores your logins in an encrypted vault and fills them in for you.

Think of it as one locked drawer for every key you own.

Bitwarden employs zero-knowledge encryption to ensure that only the end-user has access to their data, and its source code is open-source, so security experts can review the codebase for weaknesses.

こちらの簡単な概要をご覧ください。

主な機能は以下のとおりです。

• パスワードジェネレーター: Builds random passwords with rules you set, then saves them straight to your vault.
• データインポーター: Pulls passwords out of another manager and drops them into your vault.
• エクスポート保管庫: Writes a backup copy of your vault to a file you keep offline.
• レポート: Scans your saved logins and flags the ones worth changing first.
• カスタムドメイン: Groups related domains so one saved login works across all of them.

詳細なレビューについては、こちらをご覧ください。 Bitwardenのレビュー.

Bitwardenの価格設定

Here is what Bitwarden costs in 2026:

プラン	価格	最適な用途
無料	$0	Personal use on unlimited devices with unlimited passwords
プレミアム	$1	Anyone who wants security reports and an integrated authenticator
家族	$3.33	Households sharing vault items with up to six users

Bitwarden offers three subscription options for personal use: Free, Premium, and Families. 仕事 buyers get separate Teams and Enterprise plan tiers priced per user.

The Free plan allows for unlimited password storage and can be used on unlimited devices, with zero-knowledge encryption included.

Premium features add an integrated authenticator, emergency access, encrypted file attachments and the full suite of security reports.

Both Free and Premium accounts allow for sharing vault items with two users, while the Families plan allows sharing vault items with up to six users through a shared organization.

無料トライアル: The free plan never expires, and paid plans can be tested before you commit.

返金保証: Bitwarden refunds paid personal plans within 30 days of purchase.

💰 最もお得な価格: Premium — emergency access and security reports for roughly the cost of one coffee a year.

Bitwardenと代替案

So how does Bitwarden compare with the rest of the market?

この比較をご覧ください。

道具	最適な用途	価格	評価
ビットワーデン	Open-source value	月額1ドル	⭐ 4.5
1パスワード	Polished apps	月額2.99ドル	⭐ 4.7
ノルドパス	Simple mobile use	月額1.79ドル	⭐ 4.5
ダッシュレーン	内蔵 VPN	月額4.99ドル	⭐ 4.4
キーパーセキュリティ	Business rollouts	月額2.92ドル	⭐ 4.5
ラストパス	使い慣れたインターフェース	月額3ドル	⭐ 4.0
プロトンパス	Privacy bundles	月額1.99ドル	⭐ 4.4
ロボフォーム	フォームへの記入	月額1.66ドル	⭐ 4.3

おすすめ商品：

• 総合ベスト： Bitwarden — audited code, low cost, no device limits
• ベスト予算： Bitwarden Free — unlimited passwords with no upsell wall
• 初心者におすすめ： 1Password — the friendliest first-run experience
• ビジネスに最適： Keeper Security — deep admin controls for an organization

🎯 Bitwardenの代替品

Bitwardenの代替サービスをお探しですか？おすすめの選択肢はこちらです。

• 🌟 1パスワード: Best-looking apps of the group, with 旅行 mode and strong family sharing. No free plan though.
• 💼 パスパック: Team-first manager built around shared credentials and granular permissions for 中小企業 使用。
• 🚀 NordPass: Fast, clean apps from the Nord team, with data breach scanning on paid tiers.
• 🏢 キーパーセキュリティ: Heavy admin console, detailed policies and 報告 for larger organizations.
• ⭐ ラストパス: Familiar to millions, though its breach history pushed many users toward open-source tools.
• 💰 トータルパスワード: Cheap entry price with a browser-based vault and simple sharing.
• 🎨 ダッシュレーン: Bundles a VPN and dark web monitoring into one subscription for non-technical users.
• 🔧 ロボフォーム: Still the best at filling long web forms, not just login boxes.
• 🔒 プロトンパス： Pairs with Proton Mail and adds email aliases for people who want privacy by default.
• 👶 スティッキーパスワード: Offers local Wi-Fi sync, so your data never has to touch a cloud server.

全リストについては、こちらをご覧ください。 Bitwardenの代替品 ガイド。

⚔️ Bitwardenの比較

Here is how Bitwarden stacks up against each competitor:

• Bitwarden vs 1Password: 1Password wins on polish, Bitwarden wins on price and its public codebase. Free users have only one real choice here.
• Bitwarden vs Passpack: Passpack suits shared team vaults, Bitwarden covers personal and business use in one account.
• Bitwarden vs NordPass: NordPass feels smoother on mobile, Bitwarden gives more control and costs less per year.
• Bitwarden vs Keeper Security: Keeper leads on enterprise admin depth, Bitwarden leads on transparency and value.
• Bitwarden vs LastPass: Both cover the basics, but Bitwarden has been independently audited multiple times and never lost customer vaults.
• Bitwarden vs TotalPassword: TotalPassword is cheaper on paper, Bitwarden offers wider platform support and stronger reports.
• Bitwarden vs Dashlane: Dashlane bundles extras like a VPN, Bitwarden stays focused and costs a fraction as much.
• Bitwarden vs RoboForm: RoboForm handles complex forms better, Bitwarden handles security reports and sharing better.
• ビットワーデン vs プロトンパス: Proton Pass is ideal inside the Proton suite, Bitwarden works better as a standalone service.
• Bitwarden vs Sticky Password: Sticky Password offers local-only sync, Bitwarden offers audited cloud sync across every device you own.

今すぐBitwardenを使い始めましょう

Bitwardenの主要な機能をすべて使いこなせるようになりました。

• ✅ パスワードジェネレーター
• ✅ データインポーター
• ✅ エクスポート保管庫
• ✅ レポート
• ✅ カスタムドメイン

次のステップ： Pick one feature and try it today.

ほとんどの人はパスワード生成ツールから始めます。

5分もかかりません。

よくある質問

What is the best way to use Bitwarden?

Install the browser extension and mobile app, turn on two-step login, then import your old passwords. Let Bitwarden generate every new password from that point on.

Bitwardenはこれまで情報漏洩の被害に遭ったことがありますか？

No customer vault breach has been reported. Bitwarden has been independently audited multiple times, and zero-knowledge encryption means even Bitwarden cannot read your stored data.

Bitwardenは本当に安全なのか？

Yes. Your vault is encrypted on your device before it ever leaves it, the codebase is open-source, and third-party auditors review it regularly.

Can I use Bitwarden on Android?

Yes. Bitwarden has official apps for both iOS and Android. Enable Autofill Services in the app settings, then tap any login box to fill credentials automatically.

Bitwardenは本当に無料ですか？

Yes. The free plan stores unlimited passwords on unlimited devices with full encryption. Premium adds security reports, emergency access and an integrated authenticator.