diff --git a/calendar/resources/locale/ja-JP/calendar.dtd b/calendar/resources/locale/ja-JP/calendar.dtd
index 1bca4d63f877..7d7621d9d1ec 100644
--- a/calendar/resources/locale/ja-JP/calendar.dtd
+++ b/calendar/resources/locale/ja-JP/calendar.dtd
@@ -423,24 +423,24 @@
 <!-- Calendar Import Outlook CSV Dialog -->
 <!-- TRANSLATORS: all outlook*.label -fields should be translated word to word (or if possible
                   copied from outlook csv file headers -->
-<!ENTITY calendar.importoutlook.dialog.title "Outlook CSV Import" >
-<!ENTITY calendar.importoutlook.mapconcepts.label "Please map the following calendar concepts to their Outlook CSV equivalents:" >
-<!ENTITY calendar.importoutlook.outlooksubject.label "Subject" >
-<!ENTITY calendar.importoutlook.outlookstartdate.label "Start date" >
-<!ENTITY calendar.importoutlook.outlookstarttime.label "Start time" >
-<!ENTITY calendar.importoutlook.outlookenddate.label "End date" >
-<!ENTITY calendar.importoutlook.outlookendtime.label "End time" >
-<!ENTITY calendar.importoutlook.outlooklocation.label "Location" >
-<!ENTITY calendar.importoutlook.outlookdescription.label "Description" >
-<!ENTITY calendar.importoutlook.outlookallday.label "All-day event" >
-<!ENTITY calendar.importoutlook.outlookprivate.label "Private" >
-<!ENTITY calendar.importoutlook.outlookalarm.label "Alarm on/off" >
-<!ENTITY calendar.importoutlook.outlookalarmdate.label "Alarm date" >
-<!ENTITY calendar.importoutlook.outlookalarmtime.label "Alarm time" >
-<!ENTITY calendar.importoutlook.outlookcategories.label "Categories" >
-<!ENTITY calendar.importoutlook.selectmeaning.label "Select the meaning of the following word: " >
-<!ENTITY calendar.importoutlook.true.label "True" >
-<!ENTITY calendar.importoutlook.false.label "False" >
+<!ENTITY calendar.importoutlook.dialog.title "Outlook CSV のインポート" >
+<!ENTITY calendar.importoutlook.mapconcepts.label "Outlook CSV を以下のカレンダー項目に対応させてください:" >
+<!ENTITY calendar.importoutlook.outlooksubject.label "件名" >
+<!ENTITY calendar.importoutlook.outlookstartdate.label "開始日" >
+<!ENTITY calendar.importoutlook.outlookstarttime.label "開始時刻" >
+<!ENTITY calendar.importoutlook.outlookenddate.label "終了日" >
+<!ENTITY calendar.importoutlook.outlookendtime.label "終了時刻" >
+<!ENTITY calendar.importoutlook.outlooklocation.label "場所" >
+<!ENTITY calendar.importoutlook.outlookdescription.label "内容" >
+<!ENTITY calendar.importoutlook.outlookallday.label "終日ｲﾍﾞﾝﾄ" >
+<!ENTITY calendar.importoutlook.outlookprivate.label "ﾌﾟﾗｲﾍﾞｰﾄ" >
+<!ENTITY calendar.importoutlook.outlookalarm.label "ｱﾗｰﾑ ｵﾝ/ｵﾌ" >
+<!ENTITY calendar.importoutlook.outlookalarmdate.label "ｱﾗｰﾑ日付" >
+<!ENTITY calendar.importoutlook.outlookalarmtime.label "ｱﾗｰﾑ時刻" >
+<!ENTITY calendar.importoutlook.outlookcategories.label "分類" >
+<!ENTITY calendar.importoutlook.selectmeaning.label "方法を選択してください: " >
+<!ENTITY calendar.importoutlook.true.label "有効" >
+<!ENTITY calendar.importoutlook.false.label "無効" >
 
 <!-- Calendar Printing -->
 <!ENTITY calendar.print.window.title "カレンダー印刷">
diff --git a/calendar/resources/locale/ja-JP/calendar.properties b/calendar/resources/locale/ja-JP/calendar.properties
index 7b3a16aff51a..b2462bb78632 100644
--- a/calendar/resources/locale/ja-JP/calendar.properties
+++ b/calendar/resources/locale/ja-JP/calendar.properties
@@ -48,9 +48,9 @@ Cancelled=\u30ad\u30e3\u30f3\u30bb\u30eb
 noEventsToImport=\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u30a4\u30d9\u30f3\u30c8\u304c\u3042\u308a\u307e\u305b\u3093...
 noEventsToSave=\u4fdd\u5b58\u3059\u308b\u9078\u629e\u30a4\u30d9\u30f3\u30c8\u304c\u3042\u308a\u307e\u305b\u3093\u3002
 aboutToImport=%1$S \u306e\u30a4\u30d9\u30f3\u30c8\u306e\u30a4\u30f3\u30dd\u30fc\u30c8\u306b\u3064\u3044\u3066\u3002\n\u30a4\u30f3\u30dd\u30fc\u30c8\u524d\u306b\u3059\u3079\u3066\u306e\u65b0\u3057\u3044\u30a4\u30d9\u30f3\u30c8\u3092\u958b\u304d\u307e\u3059\u304b\uff1f
-aboutToImportDupes=About to import %1$S event(s) that are duplicates of events in your calendar.\nWhat do you want to do?
-discardAll=Discard all
-importAll=Import all
+aboutToImportDupes=\u91cd\u8907\u3059\u308b %1$S \u306e\u30a4\u30d9\u30f3\u30c8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u307e\u3059\u3002\n\u3069\u3046\u6271\u3044\u307e\u3059\u304b\uff1f
+discardAll=\u3059\u3079\u3066\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u306a\u3044
+importAll=\u3059\u3079\u3066\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b
 promptForEach=Prompt for each
 addDuplicate=\u91cd\u8907\u30a8\u30f3\u30c8\u30ea\u8ffd\u52a0: