diff --git a/LipSync/LipSync/Editor/TimeTable/TimeTableGroup.cs b/LipSync/LipSync/Editor/TimeTable/TimeTableGroup.cs
index c7d2197..0044203 100644
--- a/LipSync/LipSync/Editor/TimeTable/TimeTableGroup.cs
+++ b/LipSync/LipSync/Editor/TimeTable/TimeTableGroup.cs
@@ -56,6 +56,9 @@ namespace LipSync {
         [OptionalField]
         private bool m_position_fixed = false;
 
+        // Slightly different characters used in EN/JP locales for sustaining a vowel note
+        private static List<string> m_list_hyphen = new List<string>(new string[] { "ー", "-" });
+
         public Size ImageSize {
             get {
                 if ( m_character3 != null ) {
@@ -161,7 +164,7 @@ namespace LipSync {
                 lyric = spl[0].Replace( " ", "" );
 
                 VowelType type = VowelType.Attach( lyric );
-                if ( entry > 0 && lyric == "ー" ) {
+                if ( entry > 0 && m_list_hyphen.Contains(lyric) ) {
                     type = last_vowel;
                 }
                 if ( phonetics == "br1" || phonetics == "br2" || phonetics == "br3" || phonetics == "br4" || phonetics == "br5" ) {
@@ -366,7 +369,7 @@ namespace LipSync {
                 bool mode_sp = false;
                 if ( close_mouth_when_same_vowel_repeated ) {
                     // 母音が連続する場合を検出
-                    if ( separate == "" && begin == last_end && last_vowel.Equals( type ) && lyric != "ー" ) {
+                    if ( separate == "" && begin == last_end && last_vowel.Equals( type ) && !m_list_hyphen.Contains(lyric) ) {
                         if ( type.Equals( VowelType.a ) ) {
                             if ( lyric != "あ" && !phonetics.StartsWith( "a" ) ) {
                                 separate = "nn";