diff --git a/src/lang/qbittorrent_ja.ts b/src/lang/qbittorrent_ja.ts
index b7e07cd57..d1b4dd4a4 100644
--- a/src/lang/qbittorrent_ja.ts
+++ b/src/lang/qbittorrent_ja.ts
@@ -13,22 +13,6 @@
         <source>About</source>
         <translation>情報</translation>
     </message>
-    <message utf8="true">
-        <source>&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
-&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
-p, li { white-space: pre-wrap; }
-&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:&apos;Lucida Grande&apos;; font-size:13pt; font-weight:400; font-style:normal;&quot;&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;An advanced BitTorrent client programmed in C++, based on Qt4 toolkit and libtorrent-rasterbar. &lt;br /&gt;&lt;br /&gt;Copyright ©2006-2012 Christophe Dumez&lt;br /&gt;&lt;br /&gt;Home Page: &lt;a href=&quot;http://www.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://www.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;Bug Tracker: &lt;a href=&quot;http://bugs.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://bugs.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;br /&gt;Forum: &lt;a href=&quot;http://forum.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://forum.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;IRC:  #qbittorrent on Freenode&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</source>
-        <translation type="obsolete">&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
-&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
-p, li { white-space: pre-wrap; }
-&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:&apos;Lucida Grande&apos;; font-size:13pt; font-weight:400; font-style:normal;&quot;&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;C++ でプログラムされた Qt4 ツールキットおよび libtorrent-rasterbar ベースの高度な BitTorrent クライアントプログラム&lt;br /&gt;&lt;br /&gt;Copyright ©2006-2012 Christophe Dumez&lt;br /&gt;&lt;br /&gt;ホームページ: &lt;a href=&quot;http://www.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://www.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;バグトラッカー: &lt;a href=&quot;http://bugs.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://bugs.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;br /&gt;フォーラム: &lt;a href=&quot;http://forum.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://forum.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;IRC:  #qbittorrent on Freenode&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</translation>
-    </message>
     <message>
         <location filename="../about.ui" line="134"/>
         <source>Author</source>
@@ -44,7 +28,7 @@ p, li { white-space: pre-wrap; }
         <location filename="../about.ui" line="246"/>
         <location filename="../about.ui" line="287"/>
         <source>Country:</source>
-        <translation>国籍:</translation>
+        <translation>国:</translation>
     </message>
     <message>
         <location filename="../about.ui" line="234"/>
@@ -61,22 +45,28 @@ p, li { white-space: pre-wrap; }
 &lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;An advanced BitTorrent client programmed in C++, based on Qt4 toolkit and libtorrent-rasterbar. &lt;br /&gt;&lt;br /&gt;Copyright Β©2006-2013 The qBittorrent project&lt;br /&gt;&lt;br /&gt;Home Page: &lt;a href=&quot;http://www.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://www.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
 &lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;Bug Tracker: &lt;a href=&quot;http://bugs.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://bugs.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;br /&gt;Forum: &lt;a href=&quot;http://forum.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://forum.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
 &lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;IRC:  #qbittorrent on Freenode&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</source>
-        <translation type="unfinished"></translation>
+        <translation type="unfinished">&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
+&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
+p, li { white-space: pre-wrap; }
+&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:&apos;Lucida Grande&apos;; font-size:13pt; font-weight:400; font-style:normal;&quot;&gt;
+&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;Qt4 ツールキットおよび libtorrent-rasterbar を利用し、C++ でプログラムされた高度な BitTorrent クライアント. &lt;br /&gt;&lt;br /&gt;Copyright Β©2006-2013 The qBittorrent project&lt;br /&gt;&lt;br /&gt;ホームページ: &lt;a href=&quot;http://www.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://www.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
+&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;バグトラッカー: &lt;a href=&quot;http://bugs.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://bugs.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;br /&gt;フォーラム: &lt;a href=&quot;http://forum.qbittorrent.org&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://forum.qbittorrent.org&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
+&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;IRC:  #qbittorrent on Freenode&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</translation>
     </message>
     <message>
         <location filename="../about.ui" line="268"/>
         <source>Greece</source>
-        <translation type="unfinished"></translation>
+        <translation>ギリシャ</translation>
     </message>
     <message>
         <location filename="../about.ui" line="347"/>
         <source>Current maintainer</source>
-        <translation type="unfinished"></translation>
+        <translation>現在のメンテナー</translation>
     </message>
     <message>
         <location filename="../about.ui" line="360"/>
         <source>Original author</source>
-        <translation type="unfinished"></translation>
+        <translation>オリジナルのメンテナー</translation>
     </message>
     <message>
         <location filename="../about.ui" line="414"/>
@@ -88,22 +78,6 @@ p, li { white-space: pre-wrap; }
         <source>This version of qBittorrent was built against the following libraries:</source>
         <translation>このバージョンの qBittorrent は以下のライブラリを使用してビルドされています:</translation>
     </message>
-    <message>
-        <source>Qt:</source>
-        <translation type="obsolete">Qt:</translation>
-    </message>
-    <message>
-        <source>Boost:</source>
-        <translation type="obsolete">Boost:</translation>
-    </message>
-    <message>
-        <source>Libtorrent:</source>
-        <translation type="obsolete">Libtorrent:</translation>
-    </message>
-    <message>
-        <source>Christophe Dumez</source>
-        <translation type="obsolete">Christophe Dumez</translation>
-    </message>
     <message>
         <location filename="../about.ui" line="190"/>
         <source>France</source>
@@ -119,14 +93,6 @@ p, li { white-space: pre-wrap; }
         <source>License</source>
         <translation>ライセンス</translation>
     </message>
-    <message>
-        <source>&lt;h3&gt;&lt;b&gt;qBittorrent&lt;/b&gt;&lt;/h3&gt;</source>
-        <translation type="obsolete">&lt;h3&gt;&lt;b&gt;qBittorrent&lt;/b&gt;&lt;/h3&gt;</translation>
-    </message>
-    <message>
-        <source>chris@qbittorrent.org</source>
-        <translation type="obsolete">chris@qbittorrent.org</translation>
-    </message>
     <message>
         <location filename="../about.ui" line="371"/>
         <source>Thanks to</source>
@@ -135,10 +101,6 @@ p, li { white-space: pre-wrap; }
 </context>
 <context>
     <name>AddNewTorrentDialog</name>
-    <message>
-        <source>Dialog</source>
-        <translation type="obsolete">ダイアログ</translation>
-    </message>
     <message>
         <location filename="../addnewtorrentdialog.ui" line="29"/>
         <source>Save as</source>
@@ -367,7 +329,7 @@ p, li { white-space: pre-wrap; }
     <message>
         <location filename="../preferences/advancedsettings.h" line="161"/>
         <source> (auto)</source>
-        <translation type="unfinished"></translation>
+        <translation> (自動)</translation>
     </message>
     <message>
         <location filename="../preferences/advancedsettings.h" line="199"/>
@@ -498,10 +460,6 @@ p, li { white-space: pre-wrap; }
         <source>Export...</source>
         <translation>エクスポート...</translation>
     </message>
-    <message>
-        <source>...</source>
-        <translation type="obsolete">...</translation>
-    </message>
     <message>
         <location filename="../rss/automatedrssdownloader.ui" line="233"/>
         <source>Assign label:</source>
@@ -1291,10 +1249,6 @@ No further notices will be issued.</source>
         <source>Lock qBittorrent</source>
         <translation>qBittorrent をロック</translation>
     </message>
-    <message>
-        <source>Ctrl+L</source>
-        <translation type="obsolete">Ctrl+L</translation>
-    </message>
     <message>
         <location filename="../mainwindow.ui" line="301"/>
         <source>Import existing torrent...</source>
@@ -1361,11 +1315,6 @@ No further notices will be issued.</source>
         <source>Increase priority</source>
         <translation>優先度を上げる</translation>
     </message>
-    <message>
-        <source>qBittorrent %1</source>
-        <comment>e.g: qBittorrent v0.x</comment>
-        <translation type="obsolete">qBittorrent %1</translation>
-    </message>
     <message>
         <location filename="../mainwindow.cpp" line="146"/>
         <source>Set the password...</source>
@@ -1458,26 +1407,6 @@ qBittorrent を Torrent ファイルおよびマグネットリンクに関連
         <translation>Torrent %1 で I/O error が発生しました。
  理由: %2</translation>
     </message>
-    <message>
-        <source>Alt+1</source>
-        <comment>shortcut to switch to first tab</comment>
-        <translation type="obsolete">Alt+1</translation>
-    </message>
-    <message>
-        <source>Alt+2</source>
-        <comment>shortcut to switch to third tab</comment>
-        <translation type="obsolete">Alt+2</translation>
-    </message>
-    <message>
-        <source>Ctrl+F</source>
-        <comment>shortcut to switch to search tab</comment>
-        <translation type="obsolete">Ctrl+F</translation>
-    </message>
-    <message>
-        <source>Alt+3</source>
-        <comment>shortcut to switch to fourth tab</comment>
-        <translation type="obsolete">Alt+3</translation>
-    </message>
     <message>
         <location filename="../mainwindow.cpp" line="601"/>
         <source>Recursive download confirmation</source>
@@ -1579,10 +1508,6 @@ qBittorrent を終了しますか?</translation>
         <source>Options were saved successfully.</source>
         <translation>オプションは正常に保存されました。</translation>
     </message>
-    <message>
-        <source>qBittorrent</source>
-        <translation type="obsolete">qBittorrent</translation>
-    </message>
     <message>
         <location filename="../mainwindow.cpp" line="1130"/>
         <location filename="../mainwindow.cpp" line="1137"/>
@@ -1903,7 +1828,7 @@ qBittorrent をバージョン %1 へアップデートしますか?</translatio
     <message>
         <location filename="../preferences/options.ui" line="1990"/>
         <source> (&lt;a href=&quot;http://github.com/qbittorrent/qBittorrent/wiki/Anonymous-Mode&quot;&gt;More information&lt;/a&gt;)</source>
-        <translation type="unfinished"></translation>
+        <translation> (&lt;a href=&quot;http://github.com/qbittorrent/qBittorrent/wiki/Anonymous-Mode&quot;&gt;詳しい情報&lt;/a&gt;)</translation>
     </message>
     <message>
         <location filename="../preferences/options.ui" line="2033"/>
@@ -2289,10 +2214,6 @@ qBittorrent をバージョン %1 へアップデートしますか?</translatio
         <source>Enable anonymous mode</source>
         <translation>匿名モードを有効にする</translation>
     </message>
-    <message>
-        <source> (&lt;a href=&quot;http://sourceforge.net/apps/mediawiki/qbittorrent/index.php?title=Anonymous_mode&quot;&gt;More information&lt;/a&gt;)</source>
-        <translation type="obsolete"> (&lt;a href=&quot;http://sourceforge.net/apps/mediawiki/qbittorrent/index.php?title=Anonymous_mode&quot;&gt;詳細情報&lt;/a&gt;)</translation>
-    </message>
     <message>
         <location filename="../preferences/options.ui" line="2132"/>
         <source>Do not count slow torrents in these limits</source>
@@ -2773,10 +2694,6 @@ qBittorrent をバージョン %1 へアップデートしますか?</translatio
         <source>New url seed:</source>
         <translation>新しい url シード:</translation>
     </message>
-    <message>
-        <source>qBittorrent</source>
-        <translation type="obsolete">qBittorrent</translation>
-    </message>
     <message>
         <location filename="../properties/propertieswidget.cpp" line="632"/>
         <source>This url seed is already in the list.</source>
@@ -2820,7 +2737,7 @@ qBittorrent をバージョン %1 へアップデートしますか?</translatio
     <message>
         <location filename="../qtlibtorrent/qbtsession.cpp" line="412"/>
         <source>Anonymous mode [OFF]</source>
-        <translation type="unfinished"></translation>
+        <translation>匿名モード [オフ]</translation>
     </message>
     <message>
         <location filename="../qtlibtorrent/qbtsession.cpp" line="496"/>
@@ -3006,10 +2923,6 @@ qBittorrent をバージョン %1 へアップデートしますか?</translatio
         <source>The network interface defined is invalid: %1</source>
         <translation>定義されたネットワークインターフェイスが正しくありません: %1</translation>
     </message>
-    <message>
-        <source>Trying any other network interface available instead.</source>
-        <translation type="obsolete">ほかのネットワークインターフェイスの利用を試みます。</translation>
-    </message>
     <message>
         <location filename="../qtlibtorrent/qbtsession.cpp" line="1940"/>
         <source>Listening on IP address %1 on network interface %2...</source>
@@ -3191,7 +3104,7 @@ qBittorrent をバージョン %1 へアップデートしますか?</translatio
         <location filename="../rss/rss.ui" line="187"/>
         <location filename="../rss/rss.ui" line="190"/>
         <source>Update all feeds</source>
-        <translation>すべてのフィードの更新</translation>
+        <translation>全フィードの更新</translation>
     </message>
     <message>
         <location filename="../rss/rss.ui" line="158"/>
@@ -3283,19 +3196,6 @@ p, li { white-space: pre-wrap; }
         <source>New folder</source>
         <translation>新しいフォルダー</translation>
     </message>
-    <message>
-        <source>Overwrite attempt</source>
-        <translation type="obsolete">上書き試行</translation>
-    </message>
-    <message>
-        <source>You cannot overwrite %1 item.</source>
-        <comment>You cannot overwrite myFolder item.</comment>
-        <translation type="obsolete">%1 のアイテム上書きできません。</translation>
-    </message>
-    <message>
-        <source>qBittorrent</source>
-        <translation type="obsolete">qBittorrent</translation>
-    </message>
     <message>
         <location filename="../rss/rss_imp.cpp" line="204"/>
         <source>This rss feed is already in the list.</source>
@@ -3462,34 +3362,6 @@ p, li { white-space: pre-wrap; }
         <source>Searching...</source>
         <translation>検索しています...</translation>
     </message>
-    <message>
-        <source>Cut</source>
-        <translation type="obsolete">切り取り</translation>
-    </message>
-    <message>
-        <source>Copy</source>
-        <translation type="obsolete">コピー</translation>
-    </message>
-    <message>
-        <source>Paste</source>
-        <translation type="obsolete">貼り付け</translation>
-    </message>
-    <message>
-        <source>Clear field</source>
-        <translation type="obsolete">フィールドをクリア</translation>
-    </message>
-    <message>
-        <source>Clear completion history</source>
-        <translation type="obsolete">完了履歴をクリア</translation>
-    </message>
-    <message>
-        <source>Confirmation</source>
-        <translation type="obsolete">確認</translation>
-    </message>
-    <message>
-        <source>Are you sure you want to clear the history?</source>
-        <translation type="obsolete">履歴をクリアしますか?</translation>
-    </message>
     <message>
         <location filename="../searchengine/searchengine.cpp" line="221"/>
         <location filename="../searchengine/searchengine.cpp" line="251"/>
@@ -3973,18 +3845,6 @@ Please install it manually.</source>
         <source>Message</source>
         <translation>メッセージ</translation>
     </message>
-    <message>
-        <source>[DHT]</source>
-        <translation type="obsolete">[DHT]</translation>
-    </message>
-    <message>
-        <source>[PeX]</source>
-        <translation type="obsolete">[PeX]</translation>
-    </message>
-    <message>
-        <source>[LSD]</source>
-        <translation type="obsolete">[LSD]</translation>
-    </message>
     <message>
         <location filename="../properties/trackerlist.cpp" line="191"/>
         <location filename="../properties/trackerlist.cpp" line="201"/>
@@ -4030,10 +3890,6 @@ Please install it manually.</source>
         <source>Remove tracker</source>
         <translation>トラッカーの削除</translation>
     </message>
-    <message>
-        <source>Force reannounce</source>
-        <translation type="obsolete">強制再アナウンス</translation>
-    </message>
 </context>
 <context>
     <name>TrackersAdditionDlg</name>
@@ -4190,7 +4046,7 @@ Please install it manually.</source>
         <location filename="../transferlistfilterswidget.h" line="255"/>
         <location filename="../transferlistfilterswidget.h" line="492"/>
         <source>All labels</source>
-        <translation>すべてのラベル</translation>
+        <translation>全ラベル</translation>
     </message>
     <message>
         <location filename="../transferlistfilterswidget.h" line="258"/>
@@ -4486,10 +4342,6 @@ Please install it manually.</source>
 </context>
 <context>
     <name>about</name>
-    <message>
-        <source>qBittorrent</source>
-        <translation type="obsolete">qBittorrent</translation>
-    </message>
     <message>
         <location filename="../about_imp.h" line="64"/>
         <source>I would like to thank the following people who volunteered to translate qBittorrent:</source>
@@ -4934,7 +4786,7 @@ However, those plugins were disabled.</source>
     <message>
         <location filename="../stacktrace_win_dlg.ui" line="14"/>
         <source>Crash info</source>
-        <translation type="unfinished"></translation>
+        <translation>クラッシュ情報</translation>
     </message>
 </context>
 <context>