diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/IAnimationImporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/IAnimationImporter.cs
deleted file mode 100644
index 6e9a2f773b..0000000000
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/IAnimationImporter.cs
+++ /dev/null
@@ -1,11 +0,0 @@
-using System.Collections.Generic;
-using UnityEngine;
-using VRMShaders;
-
-namespace UniGLTF
-{
-    public interface IAnimationImporter
-    {
-        AnimationClip Import(glTF gltf, int i, Axes invertAxis);
-    }
-}
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/IAnimationImporter.cs.meta b/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/IAnimationImporter.cs.meta
deleted file mode 100644
index 83586e0860..0000000000
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/IAnimationImporter.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 4f950ba9271cbff4cbc4345f5a23a5d8
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/RootAnimationImporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/RootAnimationImporter.cs
deleted file mode 100644
index 980caec8a4..0000000000
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/RootAnimationImporter.cs
+++ /dev/null
@@ -1,12 +0,0 @@
-using UnityEngine;
-
-namespace UniGLTF
-{
-    public sealed class RootAnimationImporter : IAnimationImporter
-    {
-        public AnimationClip Import(glTF gltf, int i, Axes invertAxis)
-        {
-            return AnimationImporterUtil.ConvertAnimationClip(gltf, gltf.animations[i], invertAxis.Create());
-        }
-    }
-}
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/RootAnimationImporter.cs.meta b/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/RootAnimationImporter.cs.meta
deleted file mode 100644
index 2ea8cfbed7..0000000000
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/RootAnimationImporter.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 27640e6274339664ea492827be5a2217
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs
index f513391e3e..616afcda2c 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs
@@ -12,26 +12,6 @@ namespace UniGLTF
     /// </summary>
     public class ImporterContext : IDisposable
     {
-        #region Animation
-        protected IAnimationImporter m_animationImporter;
-        public void SetAnimationImporter(IAnimationImporter animationImporter)
-        {
-            m_animationImporter = animationImporter;
-        }
-        public IAnimationImporter AnimationImporter
-        {
-            get
-            {
-                if (m_animationImporter == null)
-                {
-                    m_animationImporter = new RootAnimationImporter();
-                }
-                return m_animationImporter;
-            }
-        }
-
-        #endregion
-
         public ITextureDescriptorGenerator TextureDescriptorGenerator { get; protected set; }
         public IMaterialDescriptorGenerator MaterialDescriptorGenerator { get; protected set; }
         public TextureFactory TextureFactory { get; }
@@ -123,33 +103,61 @@ public virtual async Task LoadAsync(IAwaitCaller awaitCaller = null, Func<string
 
             using (MeasureTime("AnimationImporter"))
             {
-                if (GLTF.animations != null && GLTF.animations.Any())
+                await LoadAnimationAsync(awaitCaller);
+                await SetupAnimationsAsync(awaitCaller);
+            }
+
+            await OnLoadHierarchy(awaitCaller, MeasureTime);
+        }
+
+        /// <summary>
+        /// ImporterContext.AnimationClips に AnimationClip を読み込むところまでが責務
+        /// </summary>
+        /// <param name="awaitCaller"></param>
+        /// <returns></returns>
+        protected virtual async Task LoadAnimationAsync(IAwaitCaller awaitCaller)
+        {
+            if (GLTF.animations != null && GLTF.animations.Any())
+            {
+                for (int i = 0; i < GLTF.animations.Count; ++i)
                 {
-                    var animation = Root.AddComponent<Animation>();
-                    for (int i = 0; i < GLTF.animations.Count; ++i)
+                    var gltfAnimation = GLTF.animations[i];
+                    AnimationClip clip = default;
+                    if (_externalObjectMap.TryGetValue(new SubAssetKey(typeof(AnimationClip), gltfAnimation.name), out UnityEngine.Object value))
+                    {
+                        clip = value as AnimationClip;
+                    }
+                    else
                     {
-                        var gltfAnimation = GLTF.animations[i];
-                        AnimationClip clip = default;
-                        if (_externalObjectMap.TryGetValue(new SubAssetKey(typeof(AnimationClip), gltfAnimation.name), out UnityEngine.Object value))
-                        {
-                            clip = value as AnimationClip;
-                        }
-                        else
-                        {
-                            clip = AnimationImporter.Import(GLTF, i, InvertAxis);
-                            AnimationClips.Add(clip);
-                        }
-
-                        animation.AddClip(clip, clip.name);
-                        if (i == 0)
-                        {
-                            animation.clip = clip;
-                        }
+                        clip = AnimationImporterUtil.ConvertAnimationClip(GLTF, GLTF.animations[i], InvertAxis.Create());
+                        AnimationClips.Add(clip);
                     }
                 }
+
+                await awaitCaller.NextFrame();
             }
+        }
 
-            await OnLoadHierarchy(awaitCaller, MeasureTime);
+        /// <summary>
+        /// AnimationClips を AnimationComponent に載せる
+        /// </summary>
+        protected virtual async Task SetupAnimationsAsync(IAwaitCaller awaitCaller)
+        {
+            if (AnimationClips.Count == 0)
+            {
+                return;
+            }
+            var animation = Root.AddComponent<Animation>();
+            for (int i = 0; i < AnimationClips.Count; ++i)
+            {
+                var clip = AnimationClips[i];
+                animation.AddClip(clip, clip.name);
+                if (i == 0)
+                {
+                    animation.clip = clip;
+                }
+            }
+            await awaitCaller.NextFrame();
         }
 
         protected virtual async Task LoadGeometryAsync(IAwaitCaller awaitCaller, Func<string, IDisposable> MeasureTime)
diff --git a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs
index 9ad55c1943..3c8d4e44bc 100644
--- a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs
+++ b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs
@@ -28,7 +28,7 @@ public class VRM10SpringBoneJoint : MonoBehaviour
         [SerializeField, Range(0, 0.5f), Header("Collision")]
         public float m_jointRadius = 0.02f;
 
-        SpringBoneLogic m_logic;
+        SpringBoneLogic m_logic = null;
 
         public void DrawGizmo(Transform center, Color color)
         {
diff --git a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
index c565911a59..407ea4515a 100644
--- a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
+++ b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
@@ -141,7 +141,7 @@ public static bool TryExportMaterialAsMToon(Material src, ITextureExporter textu
 
                 return true;
             }
-            catch (Exception e)
+            catch (Exception)
             {
                 dst = null;
                 return false;