diff --git a/ja/ebook/07.2.md b/ja/ebook/07.2.md
index 224247b5..2b6b9f8a 100644
--- a/ja/ebook/07.2.md
+++ b/ja/ebook/07.2.md
@@ -89,6 +89,8 @@ JSON（Javascript Object Notation）は軽量なデータ記述言語です。
 			fmt.Println(k, "is string", vv)
 		case int:
 			fmt.Println(k, "is int", vv)
+		case float64:
+			fmt.Println(k,"is float64",vv)
 		case []interface{}:
 			fmt.Println(k, "is an array:")
 			for i, u := range vv {