diff --git a/OpenUtau.Core/Classic/Ust.cs b/OpenUtau.Core/Classic/Ust.cs
index 8e4600a01..76961c59e 100644
--- a/OpenUtau.Core/Classic/Ust.cs
+++ b/OpenUtau.Core/Classic/Ust.cs
@@ -459,5 +459,27 @@ public static (List<UNote>, List<UNote>) ParsePlugin(
                 .ToList();
             return (toRemove, toAdd);
         }
+        
+        public static void WriteForSetParam(UProject project, string filePath, List<UOto> otos) {
+            using (var writer = new StreamWriter(filePath, false, Encoding.GetEncoding("shift_jis"))) {
+                writer.WriteLine("[#SETTING]");
+                writer.WriteLine($"Tempo=120");
+                writer.WriteLine("Tracks=1");
+                if (project.Saved) {
+                    writer.WriteLine($"Project={project.FilePath.Replace(".ustx", ".ust")}");
+                }
+                writer.WriteLine($"VoiceDir={Path.GetDirectoryName(otos[0].File)}");
+                writer.WriteLine($"CacheDir={PathManager.Inst.CachePath}");
+                writer.WriteLine("Mode2=True");
+
+                for (int i = 0; i < otos.Count; i++) {
+                    UOto oto = otos[i];
+                    writer.WriteLine($"[#{i:D4}]");
+                    writer.WriteLine($"Length=480");
+                    writer.WriteLine($"Lyric={oto.Alias}");
+                    writer.WriteLine($"NoteNum=60");
+                }
+            }
+        }
     }
 }
diff --git a/OpenUtau.Core/Util/Preferences.cs b/OpenUtau.Core/Util/Preferences.cs
index 6a4c949aa..c239016fc 100644
--- a/OpenUtau.Core/Util/Preferences.cs
+++ b/OpenUtau.Core/Util/Preferences.cs
@@ -180,6 +180,7 @@ public class SerializablePreferences {
             public bool LyricsHelperBrackets = false;
             public int OtoEditor = 0;
             public string VLabelerPath = string.Empty;
+            public string SetParamPath = string.Empty;
             public bool Beta = false;
             public bool RememberMid = false;
             public bool RememberUst = true;
diff --git a/OpenUtau/Strings/Strings.axaml b/OpenUtau/Strings/Strings.axaml
index 6bb5efdf6..684bc87a3 100644
--- a/OpenUtau/Strings/Strings.axaml
+++ b/OpenUtau/Strings/Strings.axaml
@@ -381,6 +381,7 @@ Warning: this option removes custom presets.</system:String>
   <system:String x:Key="prefs.on">On</system:String>
   <system:String x:Key="prefs.otoeditor">Oto Editor</system:String>
   <system:String x:Key="prefs.otoeditor.select">Default Oto Editor</system:String>
+  <system:String x:Key="prefs.otoeditor.setparampath">setParam Path</system:String>
   <system:String x:Key="prefs.paths">Paths</system:String>
   <system:String x:Key="prefs.paths.addlsinger">Additional Singer Path</system:String>
   <system:String x:Key="prefs.paths.addlsinger.install">Install to Additional Singer Path</system:String>
@@ -433,6 +434,7 @@ Warning: this option removes custom presets.</system:String>
   <system:String x:Key="progress.waitingrendering">Waiting Rendering</system:String>
 
   <system:String x:Key="singers.caption">Singers</system:String>
+  <system:String x:Key="singers.editoto.editinsetparam">Edit In setParam</system:String>
   <system:String x:Key="singers.editoto.editinvlabeler">Edit In vLabeler</system:String>
   <system:String x:Key="singers.editoto.gotosource">Goto Source File</system:String>
   <system:String x:Key="singers.editoto.regenfrq">Regenerate FRQ</system:String>
@@ -440,6 +442,7 @@ Warning: this option removes custom presets.</system:String>
   <system:String x:Key="singers.editoto.reset">Reset Otos</system:String>
   <system:String x:Key="singers.editoto.save">Save Otos</system:String>
   <system:String x:Key="singers.editoto.searchalias">Search Alias</system:String>
+  <system:String x:Key="singers.editoto.setsetparampath">Download setParam (v4.0b or higher) from http://nwp8861.blog92.fc2.com/ and set setParam path in Preferences first!</system:String>
   <system:String x:Key="singers.editoto.setvlabelerpath">Download vLabeler (1.0.0-beta1 or higher) from https://github.com/sdercolin/vlabeler and set vLabeler path in Preferences first!</system:String>
   <system:String x:Key="singers.errorreport">Generate Singer Error Report</system:String>
   <system:String x:Key="singers.location">Location</system:String>
diff --git a/OpenUtau/Strings/Strings.ja-JP.axaml b/OpenUtau/Strings/Strings.ja-JP.axaml
index 95c6a10c1..f973efbeb 100644
--- a/OpenUtau/Strings/Strings.ja-JP.axaml
+++ b/OpenUtau/Strings/Strings.ja-JP.axaml
@@ -379,6 +379,7 @@
   <system:String x:Key="prefs.on">オン</system:String>
   <system:String x:Key="prefs.otoeditor">原音設定</system:String>
   <system:String x:Key="prefs.otoeditor.select">デフォルトの原音設定エディタ</system:String>
+  <system:String x:Key="prefs.otoeditor.setparampath">setParamの場所</system:String>
   <system:String x:Key="prefs.paths">ファイルの場所</system:String>
   <system:String x:Key="prefs.paths.addlsinger">シンガーの場所（追加）</system:String>
   <system:String x:Key="prefs.paths.addlsinger.install">シンガーの場所(追加)にインストール</system:String>
@@ -431,6 +432,7 @@
   <system:String x:Key="progress.waitingrendering">レンダリング中</system:String>
 
   <system:String x:Key="singers.caption">シンガー</system:String>
+  <system:String x:Key="singers.editoto.editinsetparam">setParamで編集</system:String>
   <system:String x:Key="singers.editoto.editinvlabeler">vLabelerで編集</system:String>
   <system:String x:Key="singers.editoto.gotosource">原音の場所を開く</system:String>
   <system:String x:Key="singers.editoto.regenfrq">周波数表を再生成</system:String>
@@ -438,7 +440,8 @@
   <system:String x:Key="singers.editoto.reset">原音設定をリセット</system:String>
   <system:String x:Key="singers.editoto.save">原音設定を保存</system:String>
   <system:String x:Key="singers.editoto.searchalias">エイリアス検索</system:String>
-  <!--<system:String x:Key="singers.editoto.setvlabelerpath">Download vLabeler (1.0.0-beta1 or higher) from https://github.com/sdercolin/vlabeler and set vLabeler path in Preferences first!</system:String>-->
+  <system:String x:Key="singers.editoto.setsetparampath">先にsetParam（v4.0b以降）をダウンロードし、環境設定でパスを設定してください！ http://nwp8861.blog92.fc2.com/</system:String>
+  <system:String x:Key="singers.editoto.setvlabelerpath">先にvLabeler（1.0.0-beta1以降）をダウンロードし、環境設定でパスを設定してください！ https://github.com/sdercolin/vlabeler</system:String>
   <system:String x:Key="singers.errorreport">シンガーのError Reportを出力</system:String>
   <system:String x:Key="singers.location">ファイルの場所</system:String>
   <system:String x:Key="singers.otoview.moveleft">左へ移動</system:String>
diff --git a/OpenUtau/ViewModels/PreferencesViewModel.cs b/OpenUtau/ViewModels/PreferencesViewModel.cs
index 6a344b186..6fb623fc5 100644
--- a/OpenUtau/ViewModels/PreferencesViewModel.cs
+++ b/OpenUtau/ViewModels/PreferencesViewModel.cs
@@ -54,6 +54,7 @@ public AudioOutputDevice? AudioOutputDevice {
         [Reactive] public bool ShowGhostNotes { get; set; }
         [Reactive] public int OtoEditor { get; set; }
         public string VLabelerPath => Preferences.Default.VLabelerPath;
+        public string SetParamPath => Preferences.Default.SetParamPath;
         [Reactive] public bool ClearCacheOnQuit { get; set; }
         public int LogicalCoreCount {
             get => Environment.ProcessorCount;
@@ -374,5 +375,11 @@ public void SetVLabelerPath(string path) {
             Preferences.Save();
             this.RaisePropertyChanged(nameof(VLabelerPath));
         }
+
+        public void SetSetParamPath(string path) {
+            Preferences.Default.SetParamPath = path;
+            Preferences.Save();
+            this.RaisePropertyChanged(nameof(SetParamPath));
+        }
     }
 }
diff --git a/OpenUtau/Views/PreferencesDialog.axaml b/OpenUtau/Views/PreferencesDialog.axaml
index 7144c742b..69040dd1b 100644
--- a/OpenUtau/Views/PreferencesDialog.axaml
+++ b/OpenUtau/Views/PreferencesDialog.axaml
@@ -214,6 +214,7 @@
             <ComboBox SelectedIndex="{Binding OtoEditor}">
               <ComboBoxItem Content="OpenUtau"/>
               <ComboBoxItem Content="vLabeler"/>
+              <ComboBoxItem Content="setParam"/>
             </ComboBox>
             <TextBlock Text="{DynamicResource prefs.advanced.vlabelerpath}" Margin="0,10,0,0"/>
             <TextBlock HorizontalAlignment="Stretch" Margin="4"
@@ -224,6 +225,15 @@
               <Button Grid.Column="2" Content="{DynamicResource prefs.paths.select}"
                       HorizontalAlignment="Stretch" Click="SelectVLabelerPath"/>
             </Grid>
+            <TextBlock Text="{DynamicResource prefs.otoeditor.setparampath}" Margin="0,10,0,0"/>
+            <TextBlock HorizontalAlignment="Stretch" Margin="4"
+                       TextWrapping="Wrap" FontSize="11" Text="{Binding SetParamPath}"/>
+            <Grid HorizontalAlignment="Stretch" ColumnDefinitions="*,10,*">
+              <Button Grid.Column="0" Content="{DynamicResource prefs.paths.reset}"
+                      HorizontalAlignment="Stretch" Click="ResetSetParamPath"/>
+              <Button Grid.Column="2" Content="{DynamicResource prefs.paths.select}"
+                      HorizontalAlignment="Stretch" Click="SelectSetParamPath"/>
+            </Grid>
           </StackPanel>
         </HeaderedContentControl>
         <HeaderedContentControl Classes="groupbox" Header="{DynamicResource prefs.advanced}">
diff --git a/OpenUtau/Views/PreferencesDialog.axaml.cs b/OpenUtau/Views/PreferencesDialog.axaml.cs
index 4a8f18aa3..2371f2c4d 100644
--- a/OpenUtau/Views/PreferencesDialog.axaml.cs
+++ b/OpenUtau/Views/PreferencesDialog.axaml.cs
@@ -49,5 +49,19 @@ async void SelectVLabelerPath(object sender, RoutedEventArgs e) {
                 ((PreferencesViewModel)DataContext!).SetVLabelerPath(path);
             }
         }
+
+        void ResetSetParamPath(object sender, RoutedEventArgs e) {
+            ((PreferencesViewModel)DataContext!).SetSetParamPath(string.Empty);
+        }
+
+        async void SelectSetParamPath(object sender, RoutedEventArgs e) {
+            var path = await FilePicker.OpenFile(this, "prefs.otoeditor.setparampath", FilePicker.EXE);
+            if (string.IsNullOrEmpty(path)) {
+                return;
+            }
+            if (File.Exists(path)) {
+                ((PreferencesViewModel)DataContext!).SetSetParamPath(path);
+            }
+        }
     }
 }
diff --git a/OpenUtau/Views/SingersDialog.axaml b/OpenUtau/Views/SingersDialog.axaml
index ebfa69c89..7a462977d 100644
--- a/OpenUtau/Views/SingersDialog.axaml
+++ b/OpenUtau/Views/SingersDialog.axaml
@@ -155,6 +155,8 @@
               IsVisible="{Binding IsClassic}" IsEnabled="{Binding Singer.OtoDirty}"/>
       <Button Margin="0" Content="{DynamicResource singers.editoto.editinvlabeler}"
               IsVisible="{Binding IsClassic}" Click="OnEditInVLabeler"/>
+      <!-- <Button Margin="0" Content="{DynamicResource singers.editoto.editinsetparam}"
+              IsVisible="{Binding IsClassic}" Click="OnEditInSetParam"/>-->
     </StackPanel>
     <StackPanel Grid.Row="0" Grid.Column="2" Spacing="10" Margin="0,0,10,0" Height="20"
                 Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Bottom">
@@ -171,9 +173,10 @@
               SelectionChanged="OnSelectedOtoChanged"
               BeginningEdit="OnBeginningEdit" CellEditEnded="OnCellEditEnded">
       <DataGrid.ContextMenu>
-        <ContextMenu>
+        <ContextMenu IsVisible="{Binding IsClassic}">
           <MenuItem Header="{DynamicResource singers.editoto.gotosource}" Click="GotoSourceFile"/>
           <MenuItem Header="{DynamicResource singers.editoto.editinvlabeler}" Click="GotoVLabelerOto"/>
+          <MenuItem Header="{DynamicResource singers.editoto.editinsetparam}" Click="GotoSetParamOto"/>
           <MenuItem Header="{DynamicResource singers.editoto.regenfrq}">
             <MenuItem Header="DIO" Click="RegenFrq" Tag="dio"/>
             <MenuItem Header="DIO(5x)" Click="RegenFrq" Tag="dioss"/>
diff --git a/OpenUtau/Views/SingersDialog.axaml.cs b/OpenUtau/Views/SingersDialog.axaml.cs
index 91ef53505..369e5c819 100644
--- a/OpenUtau/Views/SingersDialog.axaml.cs
+++ b/OpenUtau/Views/SingersDialog.axaml.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
@@ -10,6 +11,7 @@
 using NAudio.Wave;
 using NWaves.Audio;
 using OpenUtau.App.ViewModels;
+using OpenUtau.Classic;
 using OpenUtau.Core;
 using OpenUtau.Core.Format;
 using OpenUtau.Core.Ustx;
@@ -224,6 +226,58 @@ private void OpenInVLabeler(USinger singer, UOto? oto) {
             }
         }
 
+        void GotoSetParamOto(object sender, RoutedEventArgs args) {
+            var viewModel = (DataContext as SingersViewModel)!;
+            if (viewModel.Singer == null) {
+                return;
+            }
+            var oto = OtoGrid?.SelectedItem as UOto;
+            if (oto == null) {
+                return;
+            }
+            if (viewModel.Singer != null) {
+                OpenInSetParam(viewModel.Singer, oto);
+            }
+        }
+
+        /*void OnEditInVSetParam(object sender, RoutedEventArgs args) {
+            var viewModel = (DataContext as SingersViewModel)!;
+            if (viewModel.Singer != null) {
+                OpenInSetParam(viewModel.Singer, null);
+            }
+        }*/
+
+        private void OpenInSetParam(USinger singer, UOto oto) {
+            string path = Core.Util.Preferences.Default.SetParamPath;
+            if (string.IsNullOrEmpty(path) || !File.Exists(path)) {
+                MessageBox.Show(
+                    this,
+                    ThemeManager.GetString("singers.editoto.setsetparampath"),
+                    ThemeManager.GetString("errors.caption"),
+                    MessageBox.MessageBoxButtons.Ok);
+                return;
+            }
+            try {
+                var tempFile = Path.Combine(PathManager.Inst.CachePath, "temp.tmp");
+                Ust.WriteForSetParam(DocManager.Inst.Project, tempFile, new List<UOto> { oto });
+
+                var startInfo = new ProcessStartInfo() {
+                    FileName = path,
+                    Arguments = $"\"{tempFile}\"",
+                    WorkingDirectory = Path.GetDirectoryName(path)
+                };
+                using (var process = Process.Start(startInfo)) {
+                    process!.WaitForExit();
+                }
+            } catch (Exception e) {
+                MessageBox.Show(
+                    this,
+                    e.ToString(),
+                    ThemeManager.GetString("errors.caption"),
+                    MessageBox.MessageBoxButtons.Ok);
+            }
+        }
+
         void OnOpenReadme(object sender, RoutedEventArgs e) {
             var viewModel = (DataContext as SingersViewModel)!;
             if (viewModel.Singer != null) {