diff --git a/Assets/UniGLTF/Editor/UniGLTF/ExportDialog/TabBar.cs b/Assets/UniGLTF/Editor/UniGLTF/ExportDialog/TabBar.cs
index 8bea7db02..09ffd2264 100644
--- a/Assets/UniGLTF/Editor/UniGLTF/ExportDialog/TabBar.cs
+++ b/Assets/UniGLTF/Editor/UniGLTF/ExportDialog/TabBar.cs
@@ -5,7 +5,6 @@ using UnityEngine;
 
 namespace UniGLTF.MeshUtility
 {
-
     public static class TabBar
     {
         /// <summary>
diff --git a/Assets/VRM10/Editor/MeshUtility.meta b/Assets/VRM10/Editor/MeshUtility.meta
new file mode 100644
index 000000000..a7f3f27f4
--- /dev/null
+++ b/Assets/VRM10/Editor/MeshUtility.meta
@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 6fb2795d5ca5ce9449de94ea5fb94dde
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/VRM10/Editor/MeshUtility/MeshIntegrationAndSplit.cs b/Assets/VRM10/Editor/MeshUtility/MeshIntegrationAndSplit.cs
new file mode 100644
index 000000000..78bdb227d
--- /dev/null
+++ b/Assets/VRM10/Editor/MeshUtility/MeshIntegrationAndSplit.cs
@@ -0,0 +1,158 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UniGLTF;
+using UnityEditor;
+using UnityEditorInternal;
+using UnityEngine;
+
+namespace UniVRM10
+{
+    class MeshIntegrationAndSplit
+    {
+        class MeshIntegrationGroup
+        {
+            public string Name;
+            public List<Renderer> Renderers = new List<Renderer>();
+        }
+        List<MeshIntegrationGroup> _meshIntegrationList = new List<MeshIntegrationGroup>();
+        List<Renderer> _renderers = new List<Renderer>();
+
+        Splitter _splitter;
+        ReorderableList _groupList;
+        ReorderableList _rendererList;
+        int _selected = -1;
+        int Selected
+        {
+            set
+            {
+                if (_selected == value)
+                {
+                    return;
+                }
+                if (value < 0 || value >= _meshIntegrationList.Count)
+                {
+                    return;
+                }
+                _selected = value;
+                _renderers.Clear();
+                _renderers.AddRange(_meshIntegrationList[_selected].Renderers);
+            }
+        }
+
+        public MeshIntegrationAndSplit(EditorWindow editor)
+        {
+            _splitter = new VerticalSplitter(editor, 50, 50);
+
+            _groupList = new ReorderableList(_meshIntegrationList, typeof(MeshIntegrationGroup));
+            _groupList.drawHeaderCallback = (Rect rect) =>
+            {
+                GUI.Label(rect, "Integration group");
+            };
+            _groupList.drawElementCallback = (Rect rect, int index, bool isActive, bool isFocused) =>
+            {
+                var group = _meshIntegrationList[index];
+                EditorGUI.TextField(rect, group.Name);
+            };
+            _groupList.onSelectCallback = rl =>
+            {
+                Selected = (rl.selectedIndices.Count > 0) ? rl.selectedIndices[0] : -1;
+            };
+
+            _rendererList = new ReorderableList(_renderers, typeof(Renderer));
+            _rendererList.drawHeaderCallback = (Rect rect) =>
+            {
+                GUI.Label(rect, "Renderer");
+            };
+            _rendererList.drawElementCallback = (Rect rect, int index, bool isActive, bool isFocused) =>
+            {
+                var r = _renderers[index];
+                EditorGUI.ObjectField(rect, r, typeof(Renderer), true);
+            };
+        }
+
+        public void UpdateMeshIntegrationList(GameObject root)
+        {
+            _selected = -1;
+            _meshIntegrationList.Clear();
+
+            IntegrateFirstPerson(root);
+            Selected = 0;
+        }
+
+        void IntegrateAll(GameObject root)
+        {
+            if (root == null)
+            {
+                return;
+            }
+            _meshIntegrationList.Add(new MeshIntegrationGroup
+            {
+                Name = "ALL",
+                Renderers = root.GetComponentsInChildren<Renderer>().ToList(),
+            });
+        }
+
+        MeshIntegrationGroup GetOrCreateGroup(string name)
+        {
+            foreach (var g in _meshIntegrationList)
+            {
+                if (g.Name == name)
+                {
+                    return g;
+                }
+            }
+            _meshIntegrationList.Add(new MeshIntegrationGroup
+            {
+                Name = name,
+            });
+            return _meshIntegrationList.Last();
+        }
+
+        void IntegrateFirstPerson(GameObject root)
+        {
+            if (root == null)
+            {
+                return;
+            }
+            var vrm1 = root.GetComponent<Vrm10Instance>();
+            if (vrm1 == null)
+            {
+                return;
+            }
+            var vrmObject = vrm1.Vrm;
+            if (vrmObject == null)
+            {
+                return;
+            }
+            var fp = vrmObject.FirstPerson;
+            if (fp == null)
+            {
+                return;
+            }
+            foreach (var a in fp.Renderers)
+            {
+                var g = GetOrCreateGroup(a.FirstPersonFlag.ToString());
+                g.Renderers.Add(a.GetRenderer(root.transform));
+            }
+        }
+
+        private void ShowGroup(Rect rect)
+        {
+            _groupList.DoList(rect);
+        }
+
+        private void ShowSelected(Rect rect)
+        {
+            _rendererList.DoList(rect);
+        }
+
+        public void OnGui(Rect rect)
+        {
+            _splitter.OnGUI(
+               rect,
+               ShowGroup,
+               ShowSelected);
+        }
+    }
+}
\ No newline at end of file
diff --git a/Assets/VRM10/Editor/MeshUtility/MeshIntegrationAndSplit.cs.meta b/Assets/VRM10/Editor/MeshUtility/MeshIntegrationAndSplit.cs.meta
new file mode 100644
index 000000000..2fb20646e
--- /dev/null
+++ b/Assets/VRM10/Editor/MeshUtility/MeshIntegrationAndSplit.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 0dd9385e7eb3d8b468ca851b18d9846f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/VRM10/Editor/MeshUtility/Splitter.cs b/Assets/VRM10/Editor/MeshUtility/Splitter.cs
new file mode 100644
index 000000000..743bae80c
--- /dev/null
+++ b/Assets/VRM10/Editor/MeshUtility/Splitter.cs
@@ -0,0 +1,183 @@
+using UnityEngine;
+using UnityEditor;
+using System;
+
+namespace UniVRM10
+{
+    [Serializable]
+    public abstract class Splitter
+    {
+        internal enum SplitMode
+        {
+            Horizontal,
+            Vertical,
+        }
+
+        protected float _value;
+
+        private EditorWindow _window;
+        private SplitMode _lockMode;
+        private float _lockValues;
+        private MouseCursor _mouseCursor;
+        protected float _barSize;
+
+        private bool _isResize;
+        private Rect _resizeRect;
+        private float _ratio = 0.5f;
+
+        private static readonly Color SPLITTER_COLOR = new Color(0, 0, 0, 1.0f);
+        private static readonly Color SPLITTER_COLOR_FREE = new Color(0.5f, 0.5f, 0.5f, 1.0f);
+
+        internal Splitter(EditorWindow window, float defaultValue, SplitMode lockMode, float minValue, float barSize = 16f)
+        {
+            _window = window;
+            _value = defaultValue;
+            _lockMode = lockMode;
+            _lockValues = minValue;
+            _mouseCursor = lockMode == SplitMode.Vertical ? MouseCursor.ResizeHorizontal : MouseCursor.ResizeVertical;
+            _barSize = barSize;
+        }
+
+        protected abstract RectOffset RectOffset();
+
+        protected abstract Rect MainRect(Rect rect);
+
+        protected abstract Rect SubRect(Rect rect);
+
+        protected abstract Rect BarRect(Rect rect);
+
+        public void OnGUI(Rect rect, Action<Rect> mainDelegate, Action<Rect> subDelegate)
+        {
+            var current = Event.current;
+
+            mainDelegate(MainRect(rect));
+            subDelegate(SubRect(rect));
+
+            _resizeRect = BarRect(rect);
+            EditorGUIUtility.AddCursorRect(_resizeRect, _mouseCursor);
+
+            var clampMax = _lockMode == SplitMode.Vertical ? rect.width - _lockValues : rect.height - _lockValues;
+            var targetSplitterValue = _lockMode == SplitMode.Vertical ? rect.width : rect.height;
+
+            _ratio = _lockMode == SplitMode.Vertical ? _value / rect.width : _value / rect.height;
+
+            if (current.type == EventType.MouseDown && _resizeRect.Contains(current.mousePosition))
+                _isResize = true;
+            if (current.type == EventType.MouseUp)
+                _isResize = false;
+
+            if (_isResize && current.type == EventType.MouseDrag)
+            {
+                var targetValue = _lockMode == SplitMode.Vertical
+                    ? current.mousePosition.x
+                    : current.mousePosition.y;
+                var diffValue = _lockMode == SplitMode.Vertical ? rect.width : rect.height;
+                _ratio = targetValue / diffValue;
+            }
+            else if (current.type != EventType.Layout && Event.current.type != EventType.Used)
+            {
+                _ratio = targetSplitterValue * _ratio / targetSplitterValue;
+            }
+
+            _value = Mathf.Clamp(targetSplitterValue * _ratio, _lockValues, clampMax);
+
+            EditorGUI.DrawRect(RectOffset().Remove(_resizeRect), SPLITTER_COLOR_FREE);
+
+            if (_isResize)
+                _window.Repaint();
+        }
+    }
+
+    [Serializable]
+    public class HorizontalSplitter : Splitter
+    {
+        private static readonly RectOffset RECT_OFFSET = new RectOffset(0, 0, 7, 8);
+
+        public HorizontalSplitter(EditorWindow window, float defaultValue, float minValue, float barSize = 16)
+        : base(window, defaultValue, SplitMode.Horizontal, minValue, barSize)
+        {
+        }
+
+        protected override RectOffset RectOffset()
+        {
+            return RECT_OFFSET;
+        }
+
+        protected override Rect MainRect(Rect rect)
+        {
+            return new Rect(rect)
+            {
+                x = 0,
+                y = 0,
+                height = _value,
+            };
+        }
+
+        protected override Rect SubRect(Rect rect)
+        {
+            return new Rect(rect)
+            {
+                x = 0,
+                y = _value,
+                height = rect.height - _value,
+            };
+        }
+
+        protected override Rect BarRect(Rect rect)
+        {
+            return new Rect(rect)
+            {
+                x = 0,
+                y = _value - _barSize / 2,
+                height = _barSize,
+            };
+        }
+
+    }
+
+    [Serializable]
+    public class VerticalSplitter : Splitter
+    {
+        private static readonly RectOffset RECT_OFFSET = new RectOffset(0, 0, 7, 8);
+
+        public VerticalSplitter(EditorWindow window, float defaultValue, float minValue, float barSize = 4)
+        : base(window, defaultValue, SplitMode.Vertical, minValue, barSize)
+        {
+        }
+
+        protected override RectOffset RectOffset()
+        {
+            return RECT_OFFSET;
+        }
+
+        protected override Rect MainRect(Rect rect)
+        {
+            return new Rect(rect)
+            {
+                x = rect.x + 0,
+                y = rect.y + 0,
+                width = _value,
+            };
+        }
+
+        protected override Rect SubRect(Rect rect)
+        {
+            return new Rect(rect)
+            {
+                x = rect.x + _value,
+                y = rect.y + 0,
+                width = rect.width - _value,
+            };
+        }
+
+        protected override Rect BarRect(Rect rect)
+        {
+            return new Rect(rect)
+            {
+                x = rect.x + _value - _barSize / 2,
+                y = rect.y + 0,
+                width = _barSize,
+            };
+        }
+    }
+}
\ No newline at end of file
diff --git a/Assets/VRM10/Editor/MeshUtility/Splitter.cs.meta b/Assets/VRM10/Editor/MeshUtility/Splitter.cs.meta
new file mode 100644
index 000000000..57ca79cfc
--- /dev/null
+++ b/Assets/VRM10/Editor/MeshUtility/Splitter.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 385274edf555ed84a9f3706ca2a99023
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/VRM10/Editor/MeshUtility/Vrm10MeshUtilityDialog.cs b/Assets/VRM10/Editor/MeshUtility/Vrm10MeshUtilityDialog.cs
new file mode 100644
index 000000000..2ef2a208f
--- /dev/null
+++ b/Assets/VRM10/Editor/MeshUtility/Vrm10MeshUtilityDialog.cs
@@ -0,0 +1,144 @@
+using UnityEngine;
+using UnityEditor;
+using UniGLTF.M17N;
+using System.Collections.Generic;
+using UniGLTF.MeshUtility;
+using UniGLTF;
+using System.Linq;
+
+namespace UniVRM10
+{
+    public class Vrm10MeshUtilityDialog : EditorWindow
+    {
+        const string TITLE = "Vrm10 Mesh Utility Window";
+
+        enum Tabs
+        {
+            MeshFreeze,
+            MeshIntegration,
+        }
+        Tabs _tab;
+
+        public static void OpenWindow()
+        {
+            var window =
+                (Vrm10MeshUtilityDialog)EditorWindow.GetWindow(typeof(Vrm10MeshUtilityDialog));
+            window.titleContent = new GUIContent(TITLE);
+            window.Show();
+        }
+
+        private void Validate()
+        {
+            _validations.Clear();
+            if (_exportTarget == null)
+            {
+                _validations.Add(Validation.Error("set vrm1"));
+                return;
+            }
+            if (_exportTarget.GetComponent<Vrm10Instance>() == null)
+            {
+                _validations.Add(Validation.Error("target is not vrm1"));
+                return;
+            }
+        }
+        bool IsValid => !_validations.Any(v => !v.CanExport);
+
+        Vector2 _scrollPos;
+        List<Validation> _validations = new List<Validation>();
+        GameObject _exportTarget;
+
+        MeshIntegrationAndSplit _meshIntegration;
+
+        void OnEnable()
+        {
+            _meshIntegration = new MeshIntegrationAndSplit(this);
+        }
+
+        private void OnGUI()
+        {
+            var modified = false;
+            _scrollPos = EditorGUILayout.BeginScrollView(_scrollPos);
+            EditorGUIUtility.labelWidth = 200;
+            LanguageGetter.OnGuiSelectLang();
+            var exportTarget = (GameObject)EditorGUILayout.ObjectField(
+                MeshUtilityMessages.TARGET_OBJECT.Msg(),
+                _exportTarget, typeof(GameObject), true);
+            if (exportTarget != _exportTarget)
+            {
+                _exportTarget = exportTarget;
+                _meshIntegration.UpdateMeshIntegrationList(_exportTarget);
+                modified = true;
+            }
+            _tab = TabBar.OnGUI(_tab, "LargeButton", GUI.ToolbarButtonSize.Fixed);
+
+            foreach (var validation in _validations)
+            {
+                validation.DrawGUI();
+            }
+
+            switch (_tab)
+            {
+                case Tabs.MeshFreeze:
+                    {
+                        if (MeshBakeGui())
+                        {
+                            modified = true;
+                        }
+                        break;
+                    }
+
+                case Tabs.MeshIntegration:
+                    {
+                        if (MeshIntegrateGui())
+                        {
+                            modified = true;
+                        }
+                        break;
+                    }
+            }
+            EditorGUILayout.EndScrollView();
+
+            if (modified)
+            {
+                Validate();
+            }
+
+            GUI.enabled = IsValid;
+            var pressed = GUILayout.Button("Process", GUILayout.MinWidth(100));
+            GUI.enabled = true;
+            if (pressed)
+            {
+                // Show Result ?
+                // Close();
+                // GUIUtility.ExitGUI();
+                Debug.Log("Process !");
+            }
+        }
+
+        bool MeshBakeGui()
+        {
+            EditorGUILayout.Toggle("BlendShape", false);
+            EditorGUILayout.Toggle("Scale", false);
+            EditorGUILayout.Toggle("Rotation", false);
+            return default;
+        }
+
+        bool MeshIntegrateGui()
+        {
+            EditorGUILayout.Toggle("FirstPerson == AUTO の生成", false);
+            EditorGUILayout.Toggle("Separate by BlendShape", false);
+            var p = position;
+            var last = GUILayoutUtility.GetLastRect();
+            var y = last.y + last.height;
+            var rect = new Rect
+            {
+                x = last.x,
+                y = y,
+                width = p.width,
+                height = p.height - y - 30
+            };
+            _meshIntegration.OnGui(rect);
+            return default;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Assets/VRM10/Editor/MeshUtility/Vrm10MeshUtilityDialog.cs.meta b/Assets/VRM10/Editor/MeshUtility/Vrm10MeshUtilityDialog.cs.meta
new file mode 100644
index 000000000..829b51745
--- /dev/null
+++ b/Assets/VRM10/Editor/MeshUtility/Vrm10MeshUtilityDialog.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 9f3af8a1b265d8a4da7ad8c1c29d2585
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/VRM10/Editor/Vrm10TopMenu.cs b/Assets/VRM10/Editor/Vrm10TopMenu.cs
index 914101aa3..81efdc956 100644
--- a/Assets/VRM10/Editor/Vrm10TopMenu.cs
+++ b/Assets/VRM10/Editor/Vrm10TopMenu.cs
@@ -1,3 +1,4 @@
+using UniGLTF.MeshUtility;
 using UnityEditor;
 
 namespace UniVRM10
@@ -11,6 +12,9 @@ namespace UniVRM10
         [MenuItem(UserMenuPrefix + "/Export VRM-1.0", priority = 1)]
         private static void OpenExportDialog() => VRM10ExportDialog.Open();
 
+        [MenuItem(UserMenuPrefix + "/MeshUtility", priority = 2)]
+        private static void OpenMeshUtility() => Vrm10MeshUtilityDialog.OpenWindow();
+
         [MenuItem(ExperimentalMenuPrefix + "/Convert BVH to VRM-Animation", priority = 100)]
         private static void ConvertVrmAnimation() => VrmAnimationMenu.BvhToVrmAnimationMenu();