5 files changed, 27 insertions, 21 deletions
diff --git a/files/ja/_redirects.txt b/files/ja/_redirects.txt
index 2165207bd5..98461ee39d 100644
--- a/files/ja/_redirects.txt
+++ b/files/ja/_redirects.txt
@@ -3110,6 +3110,9 @@
 /ja/docs/Web/API/File/fileName	/ja/docs/conflicting/Web/API/File/name
 /ja/docs/Web/API/File/fileSize	/ja/docs/conflicting/Web/API/Blob/size
 /ja/docs/Web/API/File/size	/ja/docs/Web/API/Blob/size
+/ja/docs/Web/API/FileReader/onabort	/ja/docs/conflicting/Web/API/FileReader/abort_event
+/ja/docs/Web/API/FileReader/onerror	/ja/docs/conflicting/Web/API/FileReader/error_event
+/ja/docs/Web/API/FileReader/onload	/ja/docs/conflicting/Web/API/FileReader/load_event
 /ja/docs/Web/API/Geolocation.clearWatch	/ja/docs/Web/API/Geolocation/clearWatch
 /ja/docs/Web/API/Geolocation.getCurrentPosition	/ja/docs/Web/API/Geolocation/getCurrentPosition
 /ja/docs/Web/API/Geolocation.watchPosition	/ja/docs/Web/API/Geolocation/watchPosition
diff --git a/files/ja/_wikihistory.json b/files/ja/_wikihistory.json
index 664e7a3bfe..eab8b35361 100644
--- a/files/ja/_wikihistory.json
+++ b/files/ja/_wikihistory.json
@@ -14862,24 +14862,6 @@
       "mfuji09"
     ]
   },
-  "Web/API/FileReader/onabort": {
-    "modified": "2020-09-25T19:31:51.509Z",
-    "contributors": [
-      "silverskyvicto"
-    ]
-  },
-  "Web/API/FileReader/onerror": {
-    "modified": "2020-09-25T19:37:21.563Z",
-    "contributors": [
-      "silverskyvicto"
-    ]
-  },
-  "Web/API/FileReader/onload": {
-    "modified": "2019-03-23T22:37:58.368Z",
-    "contributors": [
-      "YuichiNukiyama"
-    ]
-  },
   "Web/API/FileReader/progress_event": {
     "modified": "2020-10-15T22:16:11.772Z",
     "contributors": [
@@ -48412,6 +48394,24 @@
       "ethertank"
     ]
   },
+  "conflicting/Web/API/FileReader/abort_event": {
+    "modified": "2020-09-25T19:31:51.509Z",
+    "contributors": [
+      "silverskyvicto"
+    ]
+  },
+  "conflicting/Web/API/FileReader/error_event": {
+    "modified": "2020-09-25T19:37:21.563Z",
+    "contributors": [
+      "silverskyvicto"
+    ]
+  },
+  "conflicting/Web/API/FileReader/load_event": {
+    "modified": "2019-03-23T22:37:58.368Z",
+    "contributors": [
+      "YuichiNukiyama"
+    ]
+  },
   "conflicting/Web/API/Geolocation/getCurrentPosition": {
     "modified": "2019-03-23T22:19:48.329Z",
     "contributors": [
diff --git a/files/ja/web/api/filereader/onabort/index.html b/files/ja/conflicting/web/api/filereader/abort_event/index.html
index 594a867ef5..9aef093dc4 100644
--- a/files/ja/web/api/filereader/onabort/index.html
+++ b/files/ja/conflicting/web/api/filereader/abort_event/index.html
@@ -1,6 +1,6 @@
 ---
 title: FileReader.onabort
-slug: Web/API/FileReader/onabort
+slug: conflicting/Web/API/FileReader/abort_event
 tags:
   - Event Handler
   - File
@@ -8,6 +8,7 @@ tags:
   - Property
   - Reference
 translation_of: Web/API/FileReader/onabort
+original_slug: Web/API/FileReader/onabort
 ---
 <p><strong><code>FileReader.onabort</code></strong> プロパティには、<code><a href="/ja/docs/Web/Events/abort">abort</a></code> イベントが発生したとき、つまりファイルの読み取り処理が中止されたときに実行されるイベント ハンドラが含まれています。</p>
 
diff --git a/files/ja/web/api/filereader/onerror/index.html b/files/ja/conflicting/web/api/filereader/error_event/index.html
index 77ee74e4c9..d794e3df63 100644
--- a/files/ja/web/api/filereader/onerror/index.html
+++ b/files/ja/conflicting/web/api/filereader/error_event/index.html
@@ -1,7 +1,8 @@
 ---
 title: onerror
-slug: Web/API/FileReader/onerror
+slug: conflicting/Web/API/FileReader/error_event
 translation_of: Web/API/FileReader/onerror
+original_slug: Web/API/FileReader/onerror
 ---
 <p><a href="/ja/docs/Web/API/FileReader">FileReader</a> の onerror ハンドラは、Error オブジェクトではなく Event オブジェクトをパラメータとして受け取りますが、エラーは FileReader オブジェクトから <code><a href="/ja/docs/Web/API/FileReader/error">instanceOfFileReader.error</a></code> のようにアクセスすることができます。</p>
 
diff --git a/files/ja/web/api/filereader/onload/index.html b/files/ja/conflicting/web/api/filereader/load_event/index.html
index cee0e907f9..0dd765290c 100644
--- a/files/ja/web/api/filereader/onload/index.html
+++ b/files/ja/conflicting/web/api/filereader/load_event/index.html
@@ -1,6 +1,6 @@
 ---
 title: FileReader.onload
-slug: Web/API/FileReader/onload
+slug: conflicting/Web/API/FileReader/load_event
 tags:
   - Event Handler
   - File
@@ -8,6 +8,7 @@ tags:
   - Property
   - Reference
 translation_of: Web/API/FileReader/onload
+original_slug: Web/API/FileReader/onload
 ---
 <p>{{APIRef}}</p>