diff --git a/program/country/default.cpp b/program/country/default.cpp
new file mode 100644
index 0000000..2f6211d
--- /dev/null
+++ b/program/country/default.cpp
@@ -0,0 +1,96 @@
+#include <windows.h>
+#include "default.h"
+
+namespace default {
+
+	/**
+	 * @brief 必要とされる文字列
+	*/
+	tstring _neededString;
+
+	/**
+	 * Charsetに対するEnumFontFamiliesExのコールバック
+	 *
+	 * @param lpelfe 論理的なフォントデータ
+	 * @param lpntme 物理的なフォントデータ
+	 * @param FontType フォントの種類
+	 * @param lParam アプリケーション定義のデータ
+	 * @return 0:列挙を中止する 1:次のフォントを列挙する。
+	 */
+	int CALLBACK EnumFontCharsetProc(
+		ENUMLOGFONTEX *lpelfe,    // 論理的なフォントデータ
+		NEWTEXTMETRICEX *lpntme,  // 物理的なフォントデータ
+		DWORD FontType,           // フォントの種類
+		LPARAM lParam             // アプリケーション定義のデータ
+	)
+	{
+		if (_neededString == lpelfe->elfFullName) {
+			return 0;
+		}
+
+		return 1;
+
+	}
+
+	/**
+	 * Charsetに対するフォントを取得する
+	 *
+	 * @return 0:フォントが存在する 1:フォントは存在しない
+	 */
+	int findCharsetFont()
+	{
+		LOGFONT lf;
+
+		lf.lfPitchAndFamily = 0;
+		lf.lfCharSet = DEFAULT_CHARSET;
+
+		HDC hDC;
+		hDC = GetDC(GetDesktopWindow());
+
+		int found = 1;
+		found = ::EnumFontFamiliesEx(
+			hDC,
+			&lf,
+			(FONTENUMPROC)EnumFontCharsetProc,
+			(LPARAM)0,
+			0
+		);
+
+		return found;
+	}
+
+	/**
+	 * Write fallback font when font specified in language file is not found.
+	 * For example in Japanese, use Yu Gothic -> MS UI Gothic
+	 * Use this routine, unfortunately system font selection is too ugly such as Japan.
+	 * If you want to use language and Windows version specific fallback, copy this source for your country
+	 * and modify font name in language specific font name which is installed all Windows in your country.
+	 * 
+	 * @brief Determine exist font for default languages.
+	 * @param settingString Preferred font name
+	 * @return Choiced font name
+	*/
+	tstring getDefaultFontFallback(tstring &settingString)
+	{
+		int result = 1;
+
+		_neededString = settingString;
+
+		result = findCharsetFont();
+		if (result == 0) {
+			return settingString;
+		}
+
+		_neededString = _T("MS Shell Dlg");
+		result = findCharsetFont();
+		if (result == 0) {
+			return _neededString;
+		}
+
+		_neededString = _T("Arial");
+
+		return _neededString;
+
+	}
+
+}
diff --git a/program/country/default.h b/program/country/default.h
new file mode 100644
index 0000000..66c07a8
--- /dev/null
+++ b/program/country/default.h
@@ -0,0 +1,16 @@
+/*
+noMeiryoUI (C) 2005,2012-2023 Tatsuhiko Shoji
+The sources for noMeiryoUI are distributed under the MIT open source license
+*/
+
+#pragma once
+
+#include <string.h>
+#include <tchar.h>
+#include <tstring.h>
+
+namespace default {
+
+	extern tstring getDefaultFontFallback(tstring &settingString);
+
+};
diff --git a/program/noMeiryoUI.cpp b/program/noMeiryoUI.cpp
index 2a3ba3f..ec5b066 100644
--- a/program/noMeiryoUI.cpp
+++ b/program/noMeiryoUI.cpp
@@ -21,7 +21,8 @@ The sources for noMeiryoUI are distributed under the MIT open source license
 #include "NCFileDialog.h"
 #include "util.h"
 
-// #include "country\japan.h"
+#include "country\default.h"
+#include "country\japan.h"
 #include "country\korea.h"
 
 //
@@ -95,6 +96,7 @@ void initializeLocale(void)
 	if (!readResult) {
 		has11Preset = false;
 	}
+
 }
 
 /**
@@ -137,12 +139,7 @@ void setResourceFileName(TCHAR * langFileName, TCHAR * helpFileName, char*system
 	}
 
 	// Language detection
-	if (wcsstr(langWork, L"ja-JP") != NULL) {
-		runningCountry = Japan;
-	}
-	if (wcsstr(langWork, L"ko-KR") != NULL) {
-		runningCountry = Korea;
-	}
+	setLocationInternalCode(langWork);
 
 	_tcscpy(findPath, iniPath);
 	TCHAR *p = _tcsrchr(langWork, _T('.'));
@@ -188,6 +185,23 @@ void setResourceFileName(TCHAR * langFileName, TCHAR * helpFileName, char*system
 	}
 }
 
+/**
+ * @brief Set internal lanuguage enumeration
+ * @param langWork Locale name
+*/
+void setLocationInternalCode(TCHAR  langWork[85])
+{
+	if (wcsstr(langWork, L"ja-JP") != NULL) {
+		runningCountry = Japan;
+		return;
+	}
+	if (wcsstr(langWork, L"ko-KR") != NULL) {
+		runningCountry = Korea;
+		return;
+	}
+	runningCountry = NoCountry;
+}
+
 /**
  * �_�C�A���O�v���[�V�W��
  *
@@ -818,12 +832,9 @@ void NoMeiryoUI::applyResource()
 
 	tstring font = langResource[0];
 
-#if 0
-	// Under construction
-	if (runningCountry == Japan) {
-		font = japan::getJapaneseFontFallback(langResource[0]);
-	}
-#endif
+	// Get fallback font
+	font = getLanguageFallbackForCountry(langResource[0]);
+
 
 	HFONT displayFont = CreateFont(
 		-MulDiv(APP_FONTSIZE, GetDeviceCaps(hDC, LOGPIXELSY), 72),
@@ -919,6 +930,26 @@ void NoMeiryoUI::applyResource()
 	//DeleteObject(newFont);
 }
 
+/**
+ * @brief Get fallback font when font settings in language file didn't exist in Windows(For example older Windows)
+ * @param settingString Application display font name in language file.
+ * @return Font name adjusted by font installed in Windows.
+*/
+tstring NoMeiryoUI::getLanguageFallbackForCountry(tstring &settingString)
+{
+	tstring font;
+
+	switch (runningCountry) {
+		case Japan:
+			font = japan::getJapaneseFontFallback(langResource[0]);
+			break;
+		default:
+			font = default::getDefaultFontFallback(langResource[0]);
+			break;
+	}
+
+	return font;
+}
 
 /**
  * �t�H���g�\�����X�V����B
diff --git a/program/noMeiryoUI.h b/program/noMeiryoUI.h
index 2aa06d1..88c99e5 100644
--- a/program/noMeiryoUI.h
+++ b/program/noMeiryoUI.h
@@ -24,6 +24,8 @@ BOOL CALLBACK MonitorNearWindowCallback(
 BOOL CALLBACK setWindowSize(HWND hWnd, LPARAM lparam);
 void setResourceFileName(TCHAR* langFileName, TCHAR* helpFileName, char* localeName, TCHAR *iniPath);
 
+void setLocationInternalCode(TCHAR  langWork[85]);
+
 /** �t�H���g�̃|�C���g����ۑ�����\���� */
 struct FontPoints {
 	/** �^�C�g���o�[�t�H���g�T�C�Y(Point) */
@@ -134,6 +136,7 @@ class NoMeiryoUI : public DialogAppliBase {
 	void getOption(TCHAR *lpCmdLine);
 	void parseOption(TCHAR *param, int argCount);
 	void applyResource();
+	tstring getLanguageFallbackForCountry(tstring &settingString);
 	void showVersion(void);
 	void adjustWindowSize(void);
 
diff --git a/program/noMeiryoUI.vcxproj b/program/noMeiryoUI.vcxproj
index 6ca5d66..d78cc9c 100644
--- a/program/noMeiryoUI.vcxproj
+++ b/program/noMeiryoUI.vcxproj
@@ -183,6 +183,7 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="country\default.cpp" />
     <ClCompile Include="country\japan.cpp" />
     <ClCompile Include="country\korea.cpp" />
     <ClCompile Include="FontSel.cpp" />
@@ -206,6 +207,7 @@
     <ClCompile Include="util.cpp" />
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="country\default.h" />
     <ClInclude Include="country\japan.h" />
     <ClInclude Include="country\korea.h" />
     <ClInclude Include="FontSel.h" />
diff --git a/program/noMeiryoUI.vcxproj.filters b/program/noMeiryoUI.vcxproj.filters
index 7e17d45..a42322f 100644
--- a/program/noMeiryoUI.vcxproj.filters
+++ b/program/noMeiryoUI.vcxproj.filters
@@ -75,6 +75,9 @@
     <ClCompile Include="country\japan.cpp">
       <Filter>ソース ファイル\country</Filter>
     </ClCompile>
+    <ClCompile Include="country\default.cpp">
+      <Filter>ソース ファイル\country</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="FontSel.h">
@@ -140,6 +143,9 @@
     <ClInclude Include="country\japan.h">
       <Filter>ヘッダー ファイル\country</Filter>
     </ClInclude>
+    <ClInclude Include="country\default.h">
+      <Filter>ヘッダー ファイル\country</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Image Include="noMeiryoUI.ico">
diff --git a/program/util.h b/program/util.h
index 6153d67..1841505 100644
--- a/program/util.h
+++ b/program/util.h
@@ -105,8 +105,8 @@ void readResourceFile(TCHAR *file);
 int readFontResource8(TCHAR *file);
 int readFontResource10(TCHAR *file);
 int readFontResource11(TCHAR* file);
+void setLocationInternalCode(TCHAR langWork[85]);
 void adjustCenter(RECT parentRect, HWND parentHWnd, HWND myHWnd);
-void getKoreanFontName(TCHAR *dispBuf);
 void strreplace(TCHAR* buf, const TCHAR* source, const TCHAR* oldWord, const TCHAR* newWord, int bufLen);
 BOOL isWin11OrLater(DWORD& buildNumber);
 DWORD GetVersionForApp(DWORD &majorVersion, DWORD &minorVersion, DWORD& buildNumber);