diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/gltfExporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/gltfExporter.cs
index 28b97b39c..4d0ebd261 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/gltfExporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/gltfExporter.cs
@@ -236,6 +236,81 @@ namespace UniGLTF
             // do nothing
         }
 
+        /// <summary>
+        /// AnimationClip を収集する。
+        /// </summary>
+        List<AnimationClip> GetAnimationClips()
+        {
+            var clips = new List<AnimationClip>();
+            var animator = Copy.GetComponent<Animator>();
+            var animation = Copy.GetComponent<Animation>();
+            if (animator != null)
+            {
+                clips = AnimationExporter.GetAnimationClips(animator);
+            }
+            else if (animation != null)
+            {
+                clips = AnimationExporter.GetAnimationClips(animation);
+            }
+            return clips;
+        }
+
+        public virtual void ExportAnimations()
+        {
+            if (Application.isPlaying)
+            {
+                // UnityEditor.AnimationUtility などが Editor 専用のため、
+                // Editor 時のみ Export できる。
+                // !Application.isPlaying ならば Editor であろう。
+                return;
+            }
+
+            ReportProgress("Animations", 0.9f);
+
+            var clips = GetAnimationClips();
+
+            foreach (AnimationClip clip in clips)
+            {
+                var animationWithCurve = AnimationExporter.Export(clip, Copy.transform, Nodes);
+
+                foreach (var kv in animationWithCurve.SamplerMap)
+                {
+                    var sampler = animationWithCurve.Animation.samplers[kv.Key];
+
+                    var inputAccessorIndex = _data.ExtendBufferAndGetAccessorIndex(kv.Value.Input);
+                    sampler.input = inputAccessorIndex;
+
+                    var outputAccessorIndex = _data.ExtendBufferAndGetAccessorIndex(kv.Value.Output);
+                    sampler.output = outputAccessorIndex;
+
+                    // modify accessors
+                    var outputAccessor = _gltf.accessors[outputAccessorIndex];
+                    var channel = animationWithCurve.Animation.channels.First(x => x.sampler == kv.Key);
+                    switch (glTFAnimationTarget.GetElementCount(channel.target.path))
+                    {
+                        case 1:
+                            outputAccessor.type = "SCALAR";
+                            //outputAccessor.count = ;
+                            break;
+                        case 3:
+                            outputAccessor.type = "VEC3";
+                            outputAccessor.count /= 3;
+                            break;
+
+                        case 4:
+                            outputAccessor.type = "VEC4";
+                            outputAccessor.count /= 4;
+                            break;
+
+                        default:
+                            throw new NotImplementedException();
+                    }
+                }
+                animationWithCurve.Animation.name = clip.name;
+                _gltf.animations.Add(animationWithCurve.Animation);
+            }
+        }
+
         public virtual void Export(ITextureSerializer textureSerializer)
         {
             Nodes = Copy.transform.Traverse()
@@ -328,68 +403,7 @@ namespace UniGLTF
             }
             #endregion
 
-#if UNITY_EDITOR
-            #region Animations
-            ReportProgress("Animations", 0.9f);
-
-            var clips = new List<AnimationClip>();
-            var animator = Copy.GetComponent<Animator>();
-            var animation = Copy.GetComponent<Animation>();
-            if (animator != null)
-            {
-                clips = AnimationExporter.GetAnimationClips(animator);
-            }
-            else if (animation != null)
-            {
-                clips = AnimationExporter.GetAnimationClips(animation);
-            }
-
-            if (clips.Any())
-            {
-                foreach (AnimationClip clip in clips)
-                {
-                    var animationWithCurve = AnimationExporter.Export(clip, Copy.transform, Nodes);
-
-                    foreach (var kv in animationWithCurve.SamplerMap)
-                    {
-                        var sampler = animationWithCurve.Animation.samplers[kv.Key];
-
-                        var inputAccessorIndex = _data.ExtendBufferAndGetAccessorIndex(kv.Value.Input);
-                        sampler.input = inputAccessorIndex;
-
-                        var outputAccessorIndex = _data.ExtendBufferAndGetAccessorIndex(kv.Value.Output);
-                        sampler.output = outputAccessorIndex;
-
-                        // modify accessors
-                        var outputAccessor = _gltf.accessors[outputAccessorIndex];
-                        var channel = animationWithCurve.Animation.channels.First(x => x.sampler == kv.Key);
-                        switch (glTFAnimationTarget.GetElementCount(channel.target.path))
-                        {
-                            case 1:
-                                outputAccessor.type = "SCALAR";
-                                //outputAccessor.count = ;
-                                break;
-                            case 3:
-                                outputAccessor.type = "VEC3";
-                                outputAccessor.count /= 3;
-                                break;
-
-                            case 4:
-                                outputAccessor.type = "VEC4";
-                                outputAccessor.count /= 4;
-                                break;
-
-                            default:
-                                throw new NotImplementedException();
-                        }
-                    }
-                    animationWithCurve.Animation.name = clip.name;
-                    _gltf.animations.Add(animationWithCurve.Animation);
-                }
-
-            }
-            #endregion
-#endif
+            ExportAnimations();
 
             ExportExtensions(textureSerializer);
 
diff --git a/Assets/VRM/Runtime/IO/VRMExporter.cs b/Assets/VRM/Runtime/IO/VRMExporter.cs
index 47178ed03..14e6e84f2 100644
--- a/Assets/VRM/Runtime/IO/VRMExporter.cs
+++ b/Assets/VRM/Runtime/IO/VRMExporter.cs
@@ -40,6 +40,11 @@ namespace VRM
             return new VRMMaterialExporter();
         }
 
+        public override void ExportAnimations()
+        {
+            // do nothing
+        }
+
         public override void ExportExtensions(ITextureSerializer textureSerializer)
         {
             // avatar