diff --git a/src/main/java/org/codelibs/fess/app/web/admin/fileauth/AdminFileauthAction.java b/src/main/java/org/codelibs/fess/app/web/admin/fileauth/AdminFileauthAction.java
index b1ac82934..25f69b9e9 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/fileauth/AdminFileauthAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/fileauth/AdminFileauthAction.java
@@ -39,7 +39,6 @@ import org.lastaflute.web.Execute;
 import org.lastaflute.web.response.HtmlResponse;
 import org.lastaflute.web.response.render.RenderData;
 import org.lastaflute.web.ruts.process.ActionRuntime;
-import org.lastaflute.web.util.LaRequestUtil;
 
 /**
  * @author shinsuke
@@ -274,7 +273,7 @@ public class AdminFileauthAction extends FessAdminAction {
 
     protected void registerProtocolSchemeItems(final RenderData data) {
         final List<Map<String, String>> itemList = new ArrayList<>();
-        final Locale locale = LaRequestUtil.getRequest().getLocale();
+        final Locale locale = ComponentUtil.getRequestManager().getUserLocale();
         itemList.add(createItem(ComponentUtil.getMessageManager().getMessage(locale, "labels.file_auth_scheme_samba"), Constants.SAMBA));
         itemList.add(createItem(ComponentUtil.getMessageManager().getMessage(locale, "labels.file_auth_scheme_ftp"), Constants.FTP));
         RenderDataUtil.register(data, "protocolSchemeItems", itemList);
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/searchlist/ListForm.java b/src/main/java/org/codelibs/fess/app/web/admin/searchlist/ListForm.java
index a3ae52600..c49bb1a2c 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/searchlist/ListForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/searchlist/ListForm.java
@@ -132,7 +132,7 @@ public class ListForm implements SearchRequestParams {
 
     @Override
     public Locale getLocale() {
-        return LaRequestUtil.getRequest().getLocale();
+        return ComponentUtil.getRequestManager().getUserLocale();
     }
 
     @Override
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/webauth/AdminWebauthAction.java b/src/main/java/org/codelibs/fess/app/web/admin/webauth/AdminWebauthAction.java
index d5bf12954..e3b2da713 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/webauth/AdminWebauthAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/webauth/AdminWebauthAction.java
@@ -39,7 +39,6 @@ import org.lastaflute.web.Execute;
 import org.lastaflute.web.response.HtmlResponse;
 import org.lastaflute.web.response.render.RenderData;
 import org.lastaflute.web.ruts.process.ActionRuntime;
-import org.lastaflute.web.util.LaRequestUtil;
 
 /**
  * @author shinsuke
@@ -275,7 +274,7 @@ public class AdminWebauthAction extends FessAdminAction {
 
     protected void registerProtocolSchemeItems(final RenderData data) {
         final List<Map<String, String>> itemList = new ArrayList<>();
-        final Locale locale = LaRequestUtil.getRequest().getLocale();
+        final Locale locale = ComponentUtil.getRequestManager().getUserLocale();
         itemList.add(createItem(ComponentUtil.getMessageManager().getMessage(locale, "labels.webauth_scheme_basic"), Constants.BASIC));
         itemList.add(createItem(ComponentUtil.getMessageManager().getMessage(locale, "labels.webauth_scheme_digest"), Constants.DIGEST));
         itemList.add(createItem(ComponentUtil.getMessageManager().getMessage(locale, "labels.webauth_scheme_ntlm"), Constants.NTLM));
diff --git a/src/main/java/org/codelibs/fess/app/web/base/FessSearchAction.java b/src/main/java/org/codelibs/fess/app/web/base/FessSearchAction.java
index 2e5c0f3cf..49369cf65 100644
--- a/src/main/java/org/codelibs/fess/app/web/base/FessSearchAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/base/FessSearchAction.java
@@ -41,6 +41,7 @@ import org.codelibs.fess.helper.SystemHelper;
 import org.codelibs.fess.helper.UserInfoHelper;
 import org.codelibs.fess.helper.ViewHelper;
 import org.codelibs.fess.thumbnail.ThumbnailManager;
+import org.codelibs.fess.util.ComponentUtil;
 import org.dbflute.optional.OptionalThing;
 import org.lastaflute.web.login.LoginManager;
 import org.lastaflute.web.response.ActionResponse;
@@ -118,7 +119,7 @@ public abstract class FessSearchAction extends FessBaseAction {
         runtime.registerData("labelTypeItems", labelTypeItems);
         runtime.registerData("displayLabelTypeItems", labelTypeItems != null && !labelTypeItems.isEmpty());
 
-        Locale locale = request.getLocale();
+        Locale locale = ComponentUtil.getRequestManager().getUserLocale();
         if (locale == null) {
             locale = Locale.ENGLISH;
         }
diff --git a/src/main/java/org/codelibs/fess/app/web/base/SearchForm.java b/src/main/java/org/codelibs/fess/app/web/base/SearchForm.java
index 5bcee9909..a397372f6 100644
--- a/src/main/java/org/codelibs/fess/app/web/base/SearchForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/base/SearchForm.java
@@ -129,7 +129,7 @@ public class SearchForm implements SearchRequestParams {
 
     @Override
     public Locale getLocale() {
-        return LaRequestUtil.getRequest().getLocale();
+        return ComponentUtil.getRequestManager().getUserLocale();
     }
 
     @Override
diff --git a/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingInfoParam.java b/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingInfoParam.java
index 9af946513..7c7b9aaac 100644
--- a/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingInfoParam.java
+++ b/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingInfoParam.java
@@ -21,7 +21,6 @@ import org.codelibs.fess.es.config.bsentity.BsCrawlingInfoParam;
 import org.codelibs.fess.es.config.exbhv.CrawlingInfoBhv;
 import org.codelibs.fess.util.ComponentUtil;
 import org.dbflute.optional.OptionalEntity;
-import org.lastaflute.web.util.LaRequestUtil;
 
 /**
  * @author ESFlute (using FreeGen)
@@ -59,7 +58,7 @@ public class CrawlingInfoParam extends BsCrawlingInfoParam {
     }
 
     public String getKeyMsg() {
-        final Locale locale = LaRequestUtil.getRequest().getLocale();
+        final Locale locale = ComponentUtil.getRequestManager().getUserLocale();
         final String message = ComponentUtil.getMessageManager().getMessage(locale, "labels.crawling_info_" + getKey());
         if (message == null || message.startsWith("???")) {
             return getKey();
diff --git a/src/main/java/org/codelibs/fess/helper/SystemHelper.java b/src/main/java/org/codelibs/fess/helper/SystemHelper.java
index 655483640..aebc60804 100644
--- a/src/main/java/org/codelibs/fess/helper/SystemHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/SystemHelper.java
@@ -50,7 +50,6 @@ import org.codelibs.fess.util.ComponentUtil;
 import org.lastaflute.web.TypicalAction;
 import org.lastaflute.web.ruts.process.ActionRuntime;
 import org.lastaflute.web.servlet.request.RequestManager;
-import org.lastaflute.web.util.LaRequestUtil;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -176,19 +175,15 @@ public class SystemHelper {
 
     public String getHelpLink(final String name) {
         final String url = ComponentUtil.getFessConfig().getOnlineHelpBaseLink() + name + "-guide.html";
-        return LaRequestUtil
-                .getOptionalRequest()
-                .map(request -> {
-                    final Locale locale = request.getLocale();
-                    if (locale != null) {
-                        final String lang = locale.getLanguage();
-                        if (ComponentUtil.getFessConfig().isOnlineHelpSupportedLang(lang)) {
-                            return url.replaceFirst("\\{lang\\}", lang).replaceFirst("\\{version\\}",
-                                    Constants.MAJOR_VERSION + "." + Constants.MINOR_VERSION);
-                        }
-                    }
-                    return getDefaultHelpLink(url);
-                }).orElse(getDefaultHelpLink(url));
+        final Locale locale = ComponentUtil.getRequestManager().getUserLocale();
+        if (locale != null) {
+            final String lang = locale.getLanguage();
+            if (ComponentUtil.getFessConfig().isOnlineHelpSupportedLang(lang)) {
+                return url.replaceFirst("\\{lang\\}", lang).replaceFirst("\\{version\\}",
+                        Constants.MAJOR_VERSION + "." + Constants.MINOR_VERSION);
+            }
+        }
+        return getDefaultHelpLink(url);
     }
 
     protected String getDefaultHelpLink(final String url) {
diff --git a/src/main/java/org/codelibs/fess/helper/ViewHelper.java b/src/main/java/org/codelibs/fess/helper/ViewHelper.java
index e272bfc11..19e9878e2 100644
--- a/src/main/java/org/codelibs/fess/helper/ViewHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/ViewHelper.java
@@ -317,7 +317,7 @@ public class ViewHelper {
     }
 
     public String getPagePath(final String page) {
-        final Locale locale = LaRequestUtil.getRequest().getLocale();
+        final Locale locale = ComponentUtil.getRequestManager().getUserLocale();
         final String lang = locale.getLanguage();
         final String country = locale.getCountry();
 
@@ -378,7 +378,7 @@ public class ViewHelper {
         final FileTemplateLoader loader = new FileTemplateLoader(ResourceUtil.getViewTemplatePath().toFile());
         final Handlebars handlebars = new Handlebars(loader);
 
-        Locale locale = LaRequestUtil.getRequest().getLocale();
+        Locale locale = ComponentUtil.getRequestManager().getUserLocale();
         if (locale == null) {
             locale = Locale.ENGLISH;
         }