diff --git a/public/js/manage/page/index.js b/public/js/manage/page/index.js
index 1412047d7..e291dbf11 100644
--- a/public/js/manage/page/index.js
+++ b/public/js/manage/page/index.js
@@ -1 +1 @@
-!function(){var e="connect.manage.page.treeState:"+window.location.pathname,t="connect-page-manage-tree-preload-style",a=!1;function n(){try{var t=sessionStorage.getItem(e);if(!t)return[];var a=JSON.parse(t);return a&&Array.isArray(a.collapsed_ids)?a.collapsed_ids.map(String):[]}catch(e){return[]}}function r(){return document.querySelector("[data-page-manage-tree]")}function i(e){return e?Array.from(e.querySelectorAll("tbody tr[data-page-id]")):[]}function d(t){try{if(!t.length)return void sessionStorage.removeItem(e);sessionStorage.setItem(e,JSON.stringify({collapsed_ids:t}))}catch(e){}}function o(){var e=document.getElementById(t);e&&e.remove()}function c(){if(a){var e=i(r());e.length&&d(e.filter((function(e){return"1"===e.dataset.hasChildren&&"0"===e.dataset.treeExpanded})).map((function(e){return e.dataset.pageId})))}}function u(e,t){e.dataset.treeExpanded=t?"1":"0";var a=e.querySelector("[data-page-tree-toggle]");if(a){var n=t?"子ページを折り畳む":"子ページを展開する";a.setAttribute("aria-expanded",t?"true":"false"),a.setAttribute("aria-label",n),a.setAttribute("title",n)}}function s(e,t){e.forEach((function(e){e.hidden=!function(e,t){for(var a=e.dataset.parentId;a;){var n=t.get(a);if(!n||"1"!==n.dataset.treeExpanded)return!1;a=n.dataset.parentId}return!0}(e,t)}))}!function(){var e=n();if(e.length){var a=e.map((function(e){return'[data-page-manage-tree] tbody tr[data-ancestor-ids~="'+e+'"]'}));if(a.length){var r=document.getElementById(t);r||((r=document.createElement("style")).id=t,document.head.appendChild(r)),r.textContent=a.join(",\n")+" { display: none; }"}else o()}else o()}(),window.connectPageManageTree={init:function(){if(!a){var e=i(r());if(e.length){a=!0;var t=new Map(e.map((function(e){return[e.dataset.pageId,e]}))),l=e.filter((function(e){return"1"===e.dataset.hasChildren})),f=n();l.forEach((function(a){u(a,!0);var n=a.querySelector("[data-page-tree-toggle]");n&&n.addEventListener("click",(function(){var n="1"===a.dataset.treeExpanded;u(a,!n),s(e,t),c()}))}));var g=[];f.forEach((function(e){var a=t.get(e);a&&"1"===a.dataset.hasChildren&&(u(a,!1),g.push(e))})),s(e,t),d(g),o()}}},saveState:c}}();
\ No newline at end of file
+!function(){var e="connect.manage.page.treeState:"+window.location.pathname,t="connect-page-manage-tree-preload-style",a=!1;function n(){try{var t=sessionStorage.getItem(e);if(!t)return[];var a=JSON.parse(t);return a&&Array.isArray(a.collapsed_ids)?a.collapsed_ids.map(String):[]}catch(e){return[]}}function r(){return document.querySelector("[data-page-manage-tree]")}function i(e){return e?Array.from(e.querySelectorAll("tbody tr[data-page-id]")):[]}function o(t){try{if(!t.length)return void sessionStorage.removeItem(e);sessionStorage.setItem(e,JSON.stringify({collapsed_ids:t}))}catch(e){}}function d(){var e=document.getElementById(t);e&&e.remove()}function c(){if(a){var e=i(r());e.length&&o(e.filter((function(e){return"1"===e.dataset.hasChildren&&"0"===e.dataset.treeExpanded})).map((function(e){return e.dataset.pageId})))}}function s(e,t){e.dataset.treeExpanded=t?"1":"0";var a=e.querySelector("[data-page-tree-toggle]");if(a){var n=t?"子ページを折り畳む":"子ページを展開する";a.setAttribute("aria-expanded",t?"true":"false"),a.setAttribute("aria-label",n),a.setAttribute("title",n)}}function u(e,t){e.forEach((function(e){e.hidden=!function(e,t){return(e.dataset.ancestorIds||"").split(" ").filter(Boolean).every((function(e){var a=t.get(e);return!a||"0"!==a.dataset.treeExpanded}))}(e,t)}))}!function(){var e=n();if(e.length){var a=e.map((function(e){return'[data-page-manage-tree] tbody tr[data-ancestor-ids~="'+e+'"]'}));if(a.length){var r=document.getElementById(t);r||((r=document.createElement("style")).id=t,document.head.appendChild(r)),r.textContent=a.join(",\n")+" { display: none; }"}else d()}else d()}(),window.connectPageManageTree={init:function(){if(!a){var e=i(r());if(e.length){a=!0;var t=new Map(e.map((function(e){return[e.dataset.pageId,e]}))),l=e.filter((function(e){return"1"===e.dataset.hasChildren})),f=n();l.forEach((function(a){s(a,!0);var n=a.querySelector("[data-page-tree-toggle]");n&&n.addEventListener("click",(function(){var n="1"===a.dataset.treeExpanded;s(a,!n),u(e,t),c()}))}));var g=[];f.forEach((function(e){var a=t.get(e);a&&"1"===a.dataset.hasChildren&&(s(a,!1),g.push(e))})),u(e,t),o(g),d()}}},saveState:c}}();
\ No newline at end of file
diff --git a/public/mix-manifest.json b/public/mix-manifest.json
index d64d5e167..75b126c53 100644
--- a/public/mix-manifest.json
+++ b/public/mix-manifest.json
@@ -2,7 +2,7 @@
     "/js/app.js": "/js/app.js?id=d37e2106d540855d1011725ff6dc8391",
     "/js/wysiwyg.js": "/js/wysiwyg.js?id=8a3ae361d356b17963d1073e631dff81",
     "/js/codemirror.js": "/js/codemirror.js?id=1648b8c7831f2474820107a74359317f",
-    "/js/manage/page/index.js": "/js/manage/page/index.js?id=0baec4e0bdc17faa6677a2d9c0bed29b",
+    "/js/manage/page/index.js": "/js/manage/page/index.js?id=fcc08083204f8beb01ffa00fe8623f2e",
     "/css/app.css": "/css/app.css?id=d6fb0b661b1f484b915a1dd7c5d5f57c",
     "/fonts/vendor/@fortawesome/fontawesome-free/webfa-solid-900.woff2?2463b90d9a316e4e5294e6706b6a7a72": "/fonts/vendor/@fortawesome/fontawesome-free/webfa-solid-900.woff2?2463b90d9a316e4e5294e6706b6a7a72?id=109ad919b74a62a8a223361da1651bbc",
     "/fonts/vendor/@fortawesome/fontawesome-free/webfa-solid-900.ttf?2582b0e4bcf85eceead0de3fd9035c90": "/fonts/vendor/@fortawesome/fontawesome-free/webfa-solid-900.ttf?2582b0e4bcf85eceead0de3fd9035c90?id=8218477819a31609afa351933eebcdb4",
diff --git a/resources/js/manage/page/index.js b/resources/js/manage/page/index.js
index 46d32e9e2..79741ad00 100644
--- a/resources/js/manage/page/index.js
+++ b/resources/js/manage/page/index.js
@@ -168,22 +168,21 @@
     /**
      * 祖先の展開状態をたどり、対象行を表示すべきか判定する。
      *
+     * parent_id カラムは実体（Nested Set の _lft/_rgt）とズレている場合があるため、
+     * ちらつき防止スタイルと同じ data-ancestor-ids を判定に使う。
+     *
      * @param {HTMLElement} row 対象の行
      * @param {Map<string, HTMLElement>} rowMap ページIDと行要素の対応
      * @returns {boolean} 表示対象なら true
      */
     function isRowVisible(row, rowMap) {
-        let parentId = row.dataset.parentId;
+        const ancestorIds = (row.dataset.ancestorIds || '').split(' ').filter(Boolean);
 
-        while (parentId) {
-            const parentRow = rowMap.get(parentId);
-            if (!parentRow || parentRow.dataset.treeExpanded !== '1') {
-                return false;
-            }
-            parentId = parentRow.dataset.parentId;
-        }
-
-        return true;
+        // 祖先行が無い／折り畳みトグルを持たない場合は隠さない（明示的に閉じている時だけ隠す）。
+        return ancestorIds.every(function (ancestorId) {
+            const ancestorRow = rowMap.get(ancestorId);
+            return !ancestorRow || ancestorRow.dataset.treeExpanded !== '0';
+        });
     }
 
     /**