diff --git a/docs-gitbook/ja/data.md b/docs-gitbook/ja/data.md
index e3024cea..9e731f97 100644
--- a/docs-gitbook/ja/data.md
+++ b/docs-gitbook/ja/data.md
@@ -87,7 +87,7 @@ export default {
   },
   computed: {
     // ストアの状態から item を表示します
-    items () {
+    item () {
       return this.$store.state.items[this.$route.params.id]
     }
   }
diff --git a/docs/ja/guide/data.md b/docs/ja/guide/data.md
index 304abb21..20dc8373 100644
--- a/docs/ja/guide/data.md
+++ b/docs/ja/guide/data.md
@@ -96,7 +96,7 @@ export default {
 
   computed: {
     // ストアの状態から item を表示します
-    items () {
+    item () {
       return this.$store.state.items[this.$route.params.id]
     }
   }