diff --git a/category.php b/category.php
index 6442fd7..869a4d9 100644
--- a/category.php
+++ b/category.php
@@ -6,12 +6,18 @@
  * @version 1.0.0
  */
 
- get_header();
- $postType = get_post_type();
-
 global $wp_query;
 $tax_slug = $wp_query->get_queried_object();
 $isNoSideBar = 'online-bsss' === $tax_slug->slug;
+$lang = get_query_var('lang', '');
+if ($tax_slug->slug === 'online-bsss' && $lang === 'ja') {
+    $url = site_url('/online-bsss');
+    wp_safe_redirect($url, 301);
+    exit;
+}
+
+get_header();
+$postType = get_post_type();
 
 if ( !$postType ) {
   global $wp_query;