diff --git a/lib/v2/japanpost/radar.js b/lib/v2/japanpost/radar.js
index d28ade2ab04ce0..a1cbeff737fd16 100644
--- a/lib/v2/japanpost/radar.js
+++ b/lib/v2/japanpost/radar.js
@@ -7,7 +7,7 @@ module.exports = {
                 docs: 'https://docs.rsshub.app/routes/other#japanpost-ri-ben-you-bian',
                 source: '/services/srv/search/direct',
                 target: (params, url) => {
-                    const reqCode = new URL(url).searchParams.get('reqCodeNo1').toUpperCase();
+                    const reqCode = new URL(url).searchParams.get('reqCodeNo1').replace(/[^0-9a-zA-Z]/g, '').toUpperCase();
                     const locale = new URL(url).searchParams.get('locale').toLowerCase();
                     if ((reqCode.search(/^(?:\d{11,12}|[A-Z]{2}\d{9}[A-Z]{2})$/) === 0 && locale === 'ja') || locale === 'en') {
                         return `/japanpost/track/${reqCode}/${locale}`;