diff --git a/lambda/admin_portal/portal_page/link_list.py b/lambda/admin_portal/portal_page/link_list.py
index 86ec7b8..d856f1f 100644
--- a/lambda/admin_portal/portal_page/link_list.py
+++ b/lambda/admin_portal/portal_page/link_list.py
@@ -9,7 +9,7 @@
 from util.date_util import get_jst_datetime_now
 from util.logger_util import setup_logger
 from util.nonce_util import create_nonce
-from util.response_util import error_response, success_response
+from util.response_util import error_response, success_response, STATIC_FOOTER
 from util.static_resource_util import load_function_html
 
 logger = setup_logger("admin_portal.link_list_page")
@@ -36,7 +36,8 @@ def _get_links_html(cls, domain: str, links: list[DelibirdLink], *, style_nonce:
             'inactive_count': inactive_count,
             'now': now,
             'style_nonce': style_nonce,
-            'script_nonce': script_nonce
+            'script_nonce': script_nonce,
+            "STATIC_FOOTER": STATIC_FOOTER if STATIC_FOOTER else None
         })
 
     @classmethod
diff --git a/lambda/admin_portal/static/links.html b/lambda/admin_portal/static/links.html
index 6d008d0..20143b5 100644
--- a/lambda/admin_portal/static/links.html
+++ b/lambda/admin_portal/static/links.html
@@ -510,6 +510,9 @@ <h5 class="modal-title" id="editLinkModalLabel">
                 <small>&copy; 2025 Kazuhiro Oka</small>
             </footer>
         </div>
+        {%- if (STATIC_FOOTER is defined) and (STATIC_FOOTER is not none) %}
+        <div class="env-info"><p>{{STATIC_FOOTER}}</p></div>
+        {%- endif %}
 
         <!-- Bootstrap JS -->
         <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-geWF76RCwLtnZ8qwWowPQNguL3RmwHVBC9FhGdlKrxdiJJigb/j/68SIy3Te4Bkz" crossorigin="anonymous"></script>
diff --git a/lambda/layers/common/python/util/response_util.py b/lambda/layers/common/python/util/response_util.py
index 0396243..eff292e 100644
--- a/lambda/layers/common/python/util/response_util.py
+++ b/lambda/layers/common/python/util/response_util.py
@@ -9,7 +9,7 @@
 
 _IS_DEV = (os.environ.get("DELIBIRD_ENV") == "dev")
 _COMMIT_HASH = str(get_env_var("COMMIT_HASH", "")) if _IS_DEV else ""
-_STATIC_FOOTER: Optional[str] = html.escape(get_env_var("STATIC_FOOTER", ""))
+STATIC_FOOTER: Optional[str] = html.escape(get_env_var("STATIC_FOOTER", ""))
 
 
 def _load_error_html(status: HTTPStatus) -> tuple[Optional[str], bool]:
@@ -19,7 +19,7 @@ def _load_error_html(status: HTTPStatus) -> tuple[Optional[str], bool]:
     # 該当するステータスコードのHTMLを探す
     html_content = load_static_html(
         f"error/{status.value}.html",
-        {"STATIC_FOOTER": _STATIC_FOOTER} if _STATIC_FOOTER else None
+        {"STATIC_FOOTER": STATIC_FOOTER} if STATIC_FOOTER else None
     )
     return html_content, html_content is not None
 
diff --git a/lambda/redirect_request/protected_util.py b/lambda/redirect_request/protected_util.py
index ecc4726..d0a0e73 100644
--- a/lambda/redirect_request/protected_util.py
+++ b/lambda/redirect_request/protected_util.py
@@ -5,7 +5,7 @@
 from models.delibird_nonce import DelibirdNonceTableModel
 from util.date_util import get_jst_datetime_now
 from util.nonce_util import create_nonce
-from util.response_util import success_response
+from util.response_util import success_response, STATIC_FOOTER
 from util.static_resource_util import load_function_html
 
 NONCE_QUERY_KEY = "n"
@@ -24,7 +24,8 @@ def protected_response(domain: str, slug: str, error_message: str = ""):
         "challenge_query_key": CHALLENGE_QUERY_KEY,
         "nonce_query_key": NONCE_QUERY_KEY,
         "script_nonce": script_nonce,
-        "request_nonce": request_nonce
+        "request_nonce": request_nonce,
+        "STATIC_FOOTER": STATIC_FOOTER if STATIC_FOOTER else None
     })
 
     return success_response(HTTPStatus.UNAUTHORIZED, html_content,
diff --git a/lambda/redirect_request/static/protected.html b/lambda/redirect_request/static/protected.html
index a26af32..96d55ca 100644
--- a/lambda/redirect_request/static/protected.html
+++ b/lambda/redirect_request/static/protected.html
@@ -46,7 +46,9 @@ <h1 class="error-code"><i class="bi bi-lock"></i></h1>
                 <p>&copy; 2025 Kazuhiro Oka</p>
             </footer>
         </div>
-
+        {%- if (STATIC_FOOTER is defined) and (STATIC_FOOTER is not none) %}
+        <div class="env-info"><p>{{STATIC_FOOTER}}</p></div>
+        {%- endif %}
 
         <script {%- if script_nonce %} nonce="{{ script_nonce }}" {%- endif %}>
           document.addEventListener('DOMContentLoaded', function () {
diff --git a/s3/css/admin-portal.css b/s3/css/admin-portal.css
index e5e7bcd..67ae63c 100644
--- a/s3/css/admin-portal.css
+++ b/s3/css/admin-portal.css
@@ -20,6 +20,20 @@
     background-color: #0d6efd;
 }
 
+.env-info {
+    position: fixed;
+    bottom: 0.5rem;
+    right: 0.5rem;
+    padding: 0;
+}
+
+.env-info p {
+    margin: 0;
+    font-size: 0.65rem;
+    font-family: 'Monaco', 'Courier New', monospace;
+    color: rgba(165, 165, 165, 0.90);
+}
+
 .status-badge {
     min-width: 60px;
 }