diff --git a/src/sdlmain.cpp b/src/sdlmain.cpp
index 42b20a2..5dc474c 100644
--- a/src/sdlmain.cpp
+++ b/src/sdlmain.cpp
@@ -35,10 +35,6 @@ int main(int argc, char *argv[])
 #else
 		_stprintf_s(buf, 128, _T("Scenario Decoder SYSTEM3  -  %s"), title);
 #endif
-		wchar_t wbuf[128];
-		MultiByteToWideChar(CP_ACP, 0, buf, -1, wbuf, 128);
-		WideCharToMultiByte(CP_UTF8, 0, wbuf, -1, buf, 128, NULL, NULL);
-
 		SDL_SetWindowTitle(g_window, buf);
 	}
 
diff --git a/src/sys/nact.h b/src/sys/nact.h
index 8979343..9012271 100644
--- a/src/sys/nact.h
+++ b/src/sys/nact.h
@@ -7,7 +7,6 @@
 #ifndef _NACT_H_
 #define _NACT_H_
 
-#include <windows.h>
 #include <stdio.h>
 #include "../common.h"
 
diff --git a/src/sys/nact_crc32.cpp b/src/sys/nact_crc32.cpp
index f446879..e11d07c 100644
--- a/src/sys/nact_crc32.cpp
+++ b/src/sys/nact_crc32.cpp
@@ -31,7 +31,7 @@ uint32 NACT::calc_crc32()
 			}
 			table[i] = c;
 		}
-		// ADISK.DAT‚Ì�擪256bytes
+		// ADISK.DAT�先頭256bytes
 		for(int i = 0; i < 256; i++) {
 			int d = fio->Fgetc();
 			uint32 c = ~crc;
@@ -42,7 +42,7 @@ uint32 NACT::calc_crc32()
 	}
 #if defined(_SYSTEM2)
 	if(crc == CRC32_SDPS) {
-		// Super D.P.S‚Ì�ê�‡‚ÍBDISK.DAT‚ÌCRC‚ðŽæ‚é
+		// Super D.P.S�場��BDISK.DAT�CRCを�る
 		_stprintf_s(file_path, _MAX_PATH, _T("%sBDISK.DAT"), g_root);
 		
 		if(fio->Fopen(file_path, FILEIO_READ_BINARY)) {
@@ -58,7 +58,7 @@ uint32 NACT::calc_crc32()
 				}
 				table[i] = c;
 			}
-			// BDISK.DAT‚Ì�擪256bytes
+			// BDISK.DAT�先頭256bytes
 			crc = 0;
 			for(int i = 0; i < 256; i++) {
 				int d = fio->Fgetc();
@@ -84,19 +84,19 @@ bool NACT::get_title(_TCHAR title[], int length)
 #if defined(_SYSTEM1)
 
 #if defined(_CRESCENT)
-	_tcscpy_s(title, length, _T("ƒNƒŒƒZƒ“ƒgƒ€�[ƒ“‚ª‚Ÿ‚é"));
+	_tcscpy_s(title, length, _T("クレセントムーン��る"));
 	return true;
 #elif defined(_DPS)
 	_tcscpy_s(title, length, _T("D.P.S - Dream Program System"));
 	return true;
 #elif defined(_FUKEI)
-	_tcscpy_s(title, length, _T("•wŒx‚³‚ñ‚u‚w"));
+	_tcscpy_s(title, length, _T("婦警�んＶＸ"));
 	return true;
 #elif defined(_INTRUDER)
-	_tcscpy_s(title, length, _T("Intruder -�÷‰®•~‚Ì’T�õ-"));
+	_tcscpy_s(title, length, _T("Intruder -桜屋敷�探索-"));
 	return true;
 #elif defined(_TENGU)
-	_tcscpy_s(title, length, _T("‚ ‚Ô‚È‚¢‚Ä‚ñ‚®“`�à"));
+	_tcscpy_s(title, length, _T("�����ん��説"));
 	return true;
 #elif defined(_VAMPIRE)
 	_tcscpy_s(title, length, _T("Little Vampire"));
@@ -110,7 +110,7 @@ bool NACT::get_title(_TCHAR title[], int length)
 
 	switch(crc32) {
 		case CRC32_AYUMI_PROTO:
-			_tcscpy_s(title, length, _T("‚ ‚ä‚Ý‚¿‚á‚ñ•¨Œê PROTO"));
+			_tcscpy_s(title, length, _T("�ゆ��ゃん物語 PROTO"));
 			return true;
 		case CRC32_SDPS_MARIA:
 		case CRC32_SDPS_TONO:
@@ -129,58 +129,58 @@ bool NACT::get_title(_TCHAR title[], int length)
 	switch(crc32) {
 		case CRC32_AMBIVALENZ_FD:
 		case CRC32_AMBIVALENZ_CD:
-			_tcscpy_s(title, length, _T("AmbivalenZ �|“ñ—¥”w”½�|"));
+			_tcscpy_s(title, length, _T("AmbivalenZ −二律背�−"));
 			return true;
 		case CRC32_DPSALL:
-			_tcscpy_s(title, length, _T("D.P.S. ‘S•”"));
+			_tcscpy_s(title, length, _T("D.P.S. 全部"));
 			return true;
 		case CRC32_FUNNYBEE_CD:
 //		case CRC32_FUNNYBEE_PATCH:
 		case CRC32_FUNNYBEE_FD:
-			_tcscpy_s(title, length, _T("‰F’ˆ‰õ“�ƒtƒ@ƒj�[Bee"));
+			_tcscpy_s(title, length, _T("宇宙快盗ファニーBee"));
 			return true;
 		case CRC32_ONLYYOU:
-			_tcscpy_s(title, length, _T("Only You �|�¢‹I––‚̃Wƒ…ƒŠƒGƒbƒg’B�|"));
+			_tcscpy_s(title, length, _T("Only You −世紀末�ジュリエット�−"));
 			return true;
 		case CRC32_ONLYYOU_DEMO:
-			_tcscpy_s(title, length, _T("Only You �|�¢‹I––‚̃Wƒ…ƒŠƒGƒbƒg’B�| ƒfƒ‚”Å"));
+			_tcscpy_s(title, length, _T("Only You −世紀末�ジュリエット�− デモ版"));
 			return true;
 		case CRC32_PROSTUDENTG_CD:
 			_tcscpy_s(title, length, _T("prostudent G"));
 			return true;
 		case CRC32_RANCE41:
-			_tcscpy_s(title, length, _T("ƒ‰ƒ“ƒX 4.1 �`‚¨–ò�H�ê‚ð‹~‚¦�I�`"));
+			_tcscpy_s(title, length, _T("ランス 4.1 〜�薬工場を救��〜"));
 			return true;
 		case CRC32_RANCE42:
-			_tcscpy_s(title, length, _T("ƒ‰ƒ“ƒX 4.2 �`ƒGƒ“ƒWƒFƒ‹‘g�`"));
+			_tcscpy_s(title, length, _T("ランス 4.2 〜エンジェル組〜"));
 			return true;
 		case CRC32_AYUMI_CD:
-			_tcscpy_s(title, length, _T("‚ ‚ä‚Ý‚¿‚á‚ñ•¨Œê"));
+			_tcscpy_s(title, length, _T("�ゆ��ゃん物語"));
 			return true;
 		case CRC32_AYUMI_JISSHA_256:
-			_tcscpy_s(title, length, _T("‚ ‚ä‚Ý‚¿‚á‚ñ•¨Œê ŽÀŽÊ”Å"));
+			_tcscpy_s(title, length, _T("�ゆ��ゃん物語 実写版"));
 			return true;
 		case CRC32_AYUMI_JISSHA_FULL:
-			_tcscpy_s(title, length, _T("‚ ‚ä‚Ý‚¿‚á‚ñ•¨Œê ƒtƒ‹ƒJƒ‰�[ŽÀŽÊ”Å"));
+			_tcscpy_s(title, length, _T("�ゆ��ゃん物語 フルカラー実写版"));
 			return true;
 		case CRC32_YAKATA3_CD:
 		case CRC32_YAKATA3_FD:
-			_tcscpy_s(title, length, _T("ƒAƒŠƒX‚ÌŠÙ3"));
+			_tcscpy_s(title, length, _T("アリス�館3"));
 			return true;
 		case CRC32_HASHIRIONNA2:
-			_tcscpy_s(title, length, _T("‘–‚è�—2"));
+			_tcscpy_s(title, length, _T("走り女2"));
 			return true;
 		case CRC32_TOUSHIN2_SP:
-			_tcscpy_s(title, length, _T("“¬�_“sŽs2 ‚»‚µ‚Ä�A‚»‚ê‚©‚ç�c"));
+			_tcscpy_s(title, length, _T("闘神都市2 �����れ�ら…"));
 			return true;
 		case CRC32_OTOMESENKI:
-			_tcscpy_s(title, length, _T("‰³�—�í‹L"));
+			_tcscpy_s(title, length, _T("乙女戦記"));
 			return true;
 		case CRC32_NINGYO:
-			_tcscpy_s(title, length, _T("�l‹› -åfŽq-"));
+			_tcscpy_s(title, length, _T("人魚 -蘿�-"));
 			return true;
 		case CRC32_MUGENHOUYOU:
-			_tcscpy_s(title, length, _T("–²Œ¶–A‰e"));
+			_tcscpy_s(title, length, _T("夢幻泡影"));
 			return true;
 	}
 	title[0] = _T('\0');