3 files changed, 10 insertions, 8 deletions
diff --git a/files/ja/_redirects.txt b/files/ja/_redirects.txt
index 6117892834..de680f387d 100644
--- a/files/ja/_redirects.txt
+++ b/files/ja/_redirects.txt
@@ -3683,6 +3683,7 @@
 /ja/docs/Web/CSS/Reference/@viewport/zoom	/ja/docs/Web/CSS/@viewport
 /ja/docs/Web/CSS/Reference/Mozilla_Extensions	/ja/docs/Web/CSS/Mozilla_Extensions
 /ja/docs/Web/CSS/Scaling_background_images	/ja/docs/Web/CSS/CSS_Backgrounds_and_Borders/Resizing_background_images
+/ja/docs/Web/CSS/Tools	/ja/docs/conflicting/Web/CSS
 /ja/docs/Web/CSS/Understanding_z_index	/ja/docs/Web/CSS/CSS_Positioning/Understanding_z_index
 /ja/docs/Web/CSS/Understanding_z_index/Adding_z-index	/ja/docs/Web/CSS/CSS_Positioning/Understanding_z_index/Adding_z-index
 /ja/docs/Web/CSS/Understanding_z_index/Stacking_and_float	/ja/docs/Web/CSS/CSS_Positioning/Understanding_z_index/Stacking_and_float
diff --git a/files/ja/_wikihistory.json b/files/ja/_wikihistory.json
index 71a15c0761..44f4c575d1 100644
--- a/files/ja/_wikihistory.json
+++ b/files/ja/_wikihistory.json
@@ -29309,13 +29309,6 @@
       "sii"
     ]
   },
-  "Web/CSS/Tools": {
-    "modified": "2020-07-21T12:48:32.485Z",
-    "contributors": [
-      "mfuji09",
-      "sii"
-    ]
-  },
   "Web/CSS/Type_selectors": {
     "modified": "2020-10-15T21:20:42.015Z",
     "contributors": [
@@ -48609,6 +48602,13 @@
       "Jeremie"
     ]
   },
+  "conflicting/Web/CSS": {
+    "modified": "2020-07-21T12:48:32.485Z",
+    "contributors": [
+      "mfuji09",
+      "sii"
+    ]
+  },
   "orphaned/Building_a_Mozilla_Distribution": {
     "modified": "2019-03-23T23:49:07.062Z",
     "contributors": [
diff --git a/files/ja/web/css/tools/index.html b/files/ja/conflicting/web/css/index.html
index fb51e9d15d..9585f457ed 100644
--- a/files/ja/web/css/tools/index.html
+++ b/files/ja/conflicting/web/css/index.html
@@ -1,12 +1,13 @@
 ---
 title: ツール
-slug: Web/CSS/Tools
+slug: conflicting/Web/CSS
 tags:
   - CSS
   - Guide
   - NeedsUpdate
   - ガイド
 translation_of: Web/CSS/Tools
+original_slug: Web/CSS/Tools
 ---
 <div></div>