diff --git a/resources/lang/ja-JP/cachet.php b/resources/lang/ja-JP/cachet.php
new file mode 100644
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--- /dev/null
+++ b/resources/lang/ja-JP/cachet.php
@@ -0,0 +1,129 @@
+<?php
+
+/*
+ * This file is part of Cachet.
+ *
+ * (c) Alt Three Services Limited
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+return [
+    // Components
+    'components' => [
+        'last_updated' => '最終更新 :timestamp',
+        'status'       => [
+            0 => 'Unknown',
+            1 => '稼働中',
+            2 => 'パフォーマンスに関する問題あり',
+            3 => '一部停止中',
+            4 => '大規模な停止中',
+        ],
+        'group' => [
+            'other' => 'その他のコンポーネント',
+        ],
+    ],
+
+    // Incidents
+    'incidents' => [
+        'none'         => 'インシデントはありません',
+        'past'         => '過去のインシデント',
+        'stickied'     => 'Stickied Incidents',
+        'scheduled'    => '計画メンテナンス',
+        'scheduled_at' => ', 予定日時 :timestamp',
+        'posted'       => '投稿日時 :timestamp',
+        'status'       => [
+            1 => '調査中',
+            2 => '特定済み',
+            3 => '監視中',
+            4 => '修正済み',
+        ],
+    ],
+
+    // Schedule
+    'schedules' => [
+        'status' => [
+            0 => 'Upcoming',
+            1 => 'In Progress',
+            2 => 'Complete',
+        ],
+    ],
+
+    // Service Status
+    'service' => [
+        'good'  => '[0,1] System operational|[2,Inf] All systems are operational',
+        'bad'   => '[0,1] The system is experiencing issues|[2,Inf] Some systems are experiencing issues',
+        'major' => '[0,1] The system is experiencing major issues|[2,Inf] Some systems are experiencing major issues',
+    ],
+
+    'api' => [
+        'regenerate' => 'APIキーの再生成',
+        'revoke'     => 'APIキーの削除',
+    ],
+
+    // Metrics
+    'metrics' => [
+        'filter' => [
+            'last_hour' => '過去1時間',
+            'hourly'    => '過去12時間',
+            'weekly'    => '週',
+            'monthly'   => '月',
+        ],
+    ],
+
+    // Subscriber
+    'subscriber' => [
+        'subscribe'   => '最新のアップデート情報を購読する',
+        'unsubscribe' => 'Unsubscribe at :link',
+        'button'      => '購読',
+        'manage'      => [
+            'no_subscriptions' => 'You\'re currently subscribed to all updates.',
+            'my_subscriptions' => 'You\'re currently subscribed to the following updates.',
+        ],
+        'email' => [
+            'subscribe'          => 'メールによるアップデート情報の購読',
+            'subscribed'         => 'You\'ve been subscribed to email notifications, please check your email to confirm your subscription.',
+            'verified'           => 'Your email subscription has been confirmed. Thank you!',
+            'manage'             => 'Manage your subscription',
+            'unsubscribe'        => 'Unsubscribe from email updates.',
+            'unsubscribed'       => 'Your email subscription has been cancelled.',
+            'failure'            => 'Something went wrong with the subscription.',
+            'already-subscribed' => 'Cannot subscribe :email because they\'re already subscribed.',
+        ],
+    ],
+
+    'signup' => [
+        'title'    => '新規登録',
+        'username' => 'ユーザー名',
+        'email'    => 'Email',
+        'password' => 'パスワード',
+        'success'  => 'アカウントが作成されました。',
+        'failure'  => '新規登録に失敗しました。',
+    ],
+
+    'system' => [
+        'update' => 'Cachetの新しいバージョンがあります。アップデートの方法については<a href="https://docs.cachethq.io/docs/updating-cachet">こちら</a>を参照して下さい！',
+    ],
+
+    // Modal
+    'modal' => [
+        'close'     => '閉じる',
+        'subscribe' => [
+            'title'  => 'Subscribe to component updates',
+            'body'   => 'Enter your email address to subscribe to updates for this component. If you\'re already subscribed, you\'ll already receive emails for this component.',
+            'button' => '購読',
+        ],
+    ],
+
+    // Other
+    'home'            => 'Home',
+    'description'     => 'Stay up to date with the latest service updates from :app.',
+    'powered_by'      => 'Powered by <a href="https://cachethq.io" class="links">Cachet</a>.',
+    'timezone'        => 'Times are shown in :timezone.',
+    'about_this_site' => 'このサイトについて',
+    'rss-feed'        => 'RSS',
+    'atom-feed'       => 'Atom',
+    'feed'            => 'ステータスフィード',
+
+];
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