diff --git a/api/UniGLTF.ImporterContext.html b/api/UniGLTF.ImporterContext.html
index f0f67a3cb..5a4161d35 100644
--- a/api/UniGLTF.ImporterContext.html
+++ b/api/UniGLTF.ImporterContext.html
@@ -95,7 +95,7 @@
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext__ctor_UniGLTF_GltfData_System_Collections_Generic_IReadOnlyDictionary_VRMShaders_SubAssetKey_UnityEngine_Object__VRMShaders_ITextureDeserializer_UniGLTF_IMaterialDescriptorGenerator_.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.%23ctor(UniGLTF.GltfData%2CSystem.Collections.Generic.IReadOnlyDictionary%7BVRMShaders.SubAssetKey%2CUnityEngine.Object%7D%2CVRMShaders.ITextureDeserializer%2CUniGLTF.IMaterialDescriptorGenerator)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L30">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L31">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext__ctor_" data-uid="UniGLTF.ImporterContext.#ctor*"></a>
   <h4 id="UniGLTF_ImporterContext__ctor_UniGLTF_GltfData_System_Collections_Generic_IReadOnlyDictionary_VRMShaders_SubAssetKey_UnityEngine_Object__VRMShaders_ITextureDeserializer_UniGLTF_IMaterialDescriptorGenerator_" data-uid="UniGLTF.ImporterContext.#ctor(UniGLTF.GltfData,System.Collections.Generic.IReadOnlyDictionary{VRMShaders.SubAssetKey,UnityEngine.Object},VRMShaders.ITextureDeserializer,UniGLTF.IMaterialDescriptorGenerator)">ImporterContext(GltfData, IReadOnlyDictionary&lt;SubAssetKey, Object&gt;, ITextureDeserializer, IMaterialDescriptorGenerator)</h4>
@@ -150,7 +150,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_ExternalObjectMap.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.ExternalObjectMap%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L20">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L21">View Source</a>
   </span>
   <h4 id="UniGLTF_ImporterContext_ExternalObjectMap" data-uid="UniGLTF.ImporterContext.ExternalObjectMap">ExternalObjectMap</h4>
   <div class="markdown level1 summary"></div>
@@ -179,7 +179,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_InvertAxis.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.InvertAxis%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L67">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L68">View Source</a>
   </span>
   <h4 id="UniGLTF_ImporterContext_InvertAxis" data-uid="UniGLTF.ImporterContext.InvertAxis">InvertAxis</h4>
   <div class="markdown level1 summary"><p>GLTF から Unity に変換するときに反転させる軸</p>
@@ -209,7 +209,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_Meshes.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.Meshes%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L289">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L315">View Source</a>
   </span>
   <h4 id="UniGLTF_ImporterContext_Meshes" data-uid="UniGLTF.ImporterContext.Meshes">Meshes</h4>
   <div class="markdown level1 summary"></div>
@@ -238,7 +238,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_Nodes.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.Nodes%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L287">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L313">View Source</a>
   </span>
   <h4 id="UniGLTF_ImporterContext_Nodes" data-uid="UniGLTF.ImporterContext.Nodes">Nodes</h4>
   <div class="markdown level1 summary"></div>
@@ -267,7 +267,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_Root.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.Root%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L286">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L312">View Source</a>
   </span>
   <h4 id="UniGLTF_ImporterContext_Root" data-uid="UniGLTF.ImporterContext.Root">Root</h4>
   <div class="markdown level1 summary"></div>
@@ -296,7 +296,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_UnsupportedExtensions.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.UnsupportedExtensions%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L69">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L70">View Source</a>
   </span>
   <h4 id="UniGLTF_ImporterContext_UnsupportedExtensions" data-uid="UniGLTF.ImporterContext.UnsupportedExtensions">UnsupportedExtensions</h4>
   <div class="markdown level1 summary"></div>
@@ -327,7 +327,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_AnimationClipFactory.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.AnimationClipFactory%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L19">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L20">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_AnimationClipFactory_" data-uid="UniGLTF.ImporterContext.AnimationClipFactory*"></a>
   <h4 id="UniGLTF_ImporterContext_AnimationClipFactory" data-uid="UniGLTF.ImporterContext.AnimationClipFactory">AnimationClipFactory</h4>
@@ -357,7 +357,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_Data.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.Data%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L56">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L57">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_Data_" data-uid="UniGLTF.ImporterContext.Data*"></a>
   <h4 id="UniGLTF_ImporterContext_Data" data-uid="UniGLTF.ImporterContext.Data">Data</h4>
@@ -387,7 +387,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_GLTF.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.GLTF%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L58">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L59">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_GLTF_" data-uid="UniGLTF.ImporterContext.GLTF*"></a>
   <h4 id="UniGLTF_ImporterContext_GLTF" data-uid="UniGLTF.ImporterContext.GLTF">GLTF</h4>
@@ -417,7 +417,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_Json.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.Json%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L57">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L58">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_Json_" data-uid="UniGLTF.ImporterContext.Json*"></a>
   <h4 id="UniGLTF_ImporterContext_Json" data-uid="UniGLTF.ImporterContext.Json">Json</h4>
@@ -447,7 +447,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_MaterialDescriptorGenerator.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.MaterialDescriptorGenerator%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L16">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L17">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_MaterialDescriptorGenerator_" data-uid="UniGLTF.ImporterContext.MaterialDescriptorGenerator*"></a>
   <h4 id="UniGLTF_ImporterContext_MaterialDescriptorGenerator" data-uid="UniGLTF.ImporterContext.MaterialDescriptorGenerator">MaterialDescriptorGenerator</h4>
@@ -477,7 +477,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_MaterialFactory.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.MaterialFactory%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L18">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L19">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_MaterialFactory_" data-uid="UniGLTF.ImporterContext.MaterialFactory*"></a>
   <h4 id="UniGLTF_ImporterContext_MaterialFactory" data-uid="UniGLTF.ImporterContext.MaterialFactory">MaterialFactory</h4>
@@ -507,7 +507,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_Storage.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.Storage%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L59">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L60">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_Storage_" data-uid="UniGLTF.ImporterContext.Storage*"></a>
   <h4 id="UniGLTF_ImporterContext_Storage" data-uid="UniGLTF.ImporterContext.Storage">Storage</h4>
@@ -537,7 +537,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_TextureDescriptorGenerator.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.TextureDescriptorGenerator%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L15">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L16">View Source</a>
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   <a id="UniGLTF_ImporterContext_TextureDescriptorGenerator_" data-uid="UniGLTF.ImporterContext.TextureDescriptorGenerator*"></a>
   <h4 id="UniGLTF_ImporterContext_TextureDescriptorGenerator" data-uid="UniGLTF.ImporterContext.TextureDescriptorGenerator">TextureDescriptorGenerator</h4>
@@ -567,7 +567,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_TextureFactory.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.TextureFactory%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L17">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L18">View Source</a>
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   <a id="UniGLTF_ImporterContext_TextureFactory_" data-uid="UniGLTF.ImporterContext.TextureFactory*"></a>
   <h4 id="UniGLTF_ImporterContext_TextureFactory" data-uid="UniGLTF.ImporterContext.TextureFactory">TextureFactory</h4>
@@ -599,7 +599,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_Dispose.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.Dispose%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L295">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L321">View Source</a>
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   <a id="UniGLTF_ImporterContext_Dispose_" data-uid="UniGLTF.ImporterContext.Dispose*"></a>
   <h4 id="UniGLTF_ImporterContext_Dispose" data-uid="UniGLTF.ImporterContext.Dispose">Dispose()</h4>
@@ -615,7 +615,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_LoadAnimationAsync_VRMShaders_IAwaitCaller_.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.LoadAnimationAsync(VRMShaders.IAwaitCaller)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L129">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L130">View Source</a>
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   <a id="UniGLTF_ImporterContext_LoadAnimationAsync_" data-uid="UniGLTF.ImporterContext.LoadAnimationAsync*"></a>
   <h4 id="UniGLTF_ImporterContext_LoadAnimationAsync_VRMShaders_IAwaitCaller_" data-uid="UniGLTF.ImporterContext.LoadAnimationAsync(VRMShaders.IAwaitCaller)">LoadAnimationAsync(IAwaitCaller)</h4>
@@ -662,7 +662,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_LoadAsync_VRMShaders_IAwaitCaller_System_Func_System_String_System_IDisposable__.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.LoadAsync(VRMShaders.IAwaitCaller%2CSystem.Func%7BSystem.String%2CSystem.IDisposable%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L78">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L79">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_LoadAsync_" data-uid="UniGLTF.ImporterContext.LoadAsync*"></a>
   <h4 id="UniGLTF_ImporterContext_LoadAsync_VRMShaders_IAwaitCaller_System_Func_System_String_System_IDisposable__" data-uid="UniGLTF.ImporterContext.LoadAsync(VRMShaders.IAwaitCaller,System.Func{System.String,System.IDisposable})">LoadAsync(IAwaitCaller, Func&lt;String, IDisposable&gt;)</h4>
@@ -714,7 +714,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_LoadGeometryAsync_VRMShaders_IAwaitCaller_System_Func_System_String_System_IDisposable__.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.LoadGeometryAsync(VRMShaders.IAwaitCaller%2CSystem.Func%7BSystem.String%2CSystem.IDisposable%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L167">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L168">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_LoadGeometryAsync_" data-uid="UniGLTF.ImporterContext.LoadGeometryAsync*"></a>
   <h4 id="UniGLTF_ImporterContext_LoadGeometryAsync_VRMShaders_IAwaitCaller_System_Func_System_String_System_IDisposable__" data-uid="UniGLTF.ImporterContext.LoadGeometryAsync(VRMShaders.IAwaitCaller,System.Func{System.String,System.IDisposable})">LoadGeometryAsync(IAwaitCaller, Func&lt;String, IDisposable&gt;)</h4>
@@ -766,7 +766,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_LoadMaterialsAsync_VRMShaders_IAwaitCaller_.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.LoadMaterialsAsync(VRMShaders.IAwaitCaller)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L236">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L262">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_LoadMaterialsAsync_" data-uid="UniGLTF.ImporterContext.LoadMaterialsAsync*"></a>
   <h4 id="UniGLTF_ImporterContext_LoadMaterialsAsync_VRMShaders_IAwaitCaller_" data-uid="UniGLTF.ImporterContext.LoadMaterialsAsync(VRMShaders.IAwaitCaller)">LoadMaterialsAsync(IAwaitCaller)</h4>
@@ -813,7 +813,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_LoadTexturesAsync_VRMShaders_IAwaitCaller_.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.LoadTexturesAsync(VRMShaders.IAwaitCaller)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L225">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L251">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_LoadTexturesAsync_" data-uid="UniGLTF.ImporterContext.LoadTexturesAsync*"></a>
   <h4 id="UniGLTF_ImporterContext_LoadTexturesAsync_VRMShaders_IAwaitCaller_" data-uid="UniGLTF.ImporterContext.LoadTexturesAsync(VRMShaders.IAwaitCaller)">LoadTexturesAsync(IAwaitCaller)</h4>
@@ -860,7 +860,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_OnLoadHierarchy_VRMShaders_IAwaitCaller_System_Func_System_String_System_IDisposable__.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.OnLoadHierarchy(VRMShaders.IAwaitCaller%2CSystem.Func%7BSystem.String%2CSystem.IDisposable%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L256">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L282">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_OnLoadHierarchy_" data-uid="UniGLTF.ImporterContext.OnLoadHierarchy*"></a>
   <h4 id="UniGLTF_ImporterContext_OnLoadHierarchy_VRMShaders_IAwaitCaller_System_Func_System_String_System_IDisposable__" data-uid="UniGLTF.ImporterContext.OnLoadHierarchy(VRMShaders.IAwaitCaller,System.Func{System.String,System.IDisposable})">OnLoadHierarchy(IAwaitCaller, Func&lt;String, IDisposable&gt;)</h4>
@@ -912,7 +912,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_SetupAnimationsAsync_VRMShaders_IAwaitCaller_.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.SetupAnimationsAsync(VRMShaders.IAwaitCaller)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L148">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L149">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_SetupAnimationsAsync_" data-uid="UniGLTF.ImporterContext.SetupAnimationsAsync*"></a>
   <h4 id="UniGLTF_ImporterContext_SetupAnimationsAsync_VRMShaders_IAwaitCaller_" data-uid="UniGLTF.ImporterContext.SetupAnimationsAsync(VRMShaders.IAwaitCaller)">SetupAnimationsAsync(IAwaitCaller)</h4>
@@ -960,7 +960,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext_TransferOwnership_VRMShaders_TakeResponsibilityForDestroyObjectFunc_.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext.TransferOwnership(VRMShaders.TakeResponsibilityForDestroyObjectFunc)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
   </span>
   <span class="small pull-right mobile-hide">
-    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L312">View Source</a>
+    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L338">View Source</a>
   </span>
   <a id="UniGLTF_ImporterContext_TransferOwnership_" data-uid="UniGLTF.ImporterContext.TransferOwnership*"></a>
   <h4 id="UniGLTF_ImporterContext_TransferOwnership_VRMShaders_TakeResponsibilityForDestroyObjectFunc_" data-uid="UniGLTF.ImporterContext.TransferOwnership(VRMShaders.TakeResponsibilityForDestroyObjectFunc)">TransferOwnership(TakeResponsibilityForDestroyObjectFunc)</h4>
@@ -1003,7 +1003,7 @@ LoadAsync が成功した場合、返り値(RuntimeGltfInstance) に破棄する
                     <a href="https://github.com/vrm-c/UniVRM/new/master/apiSpec/new?filename=UniGLTF_ImporterContext.md&amp;value=---%0Auid%3A%20UniGLTF.ImporterContext%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A" class="contribution-link">Improve this Doc</a>
                   </li>
                   <li>
-                    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L13" class="contribution-link">View Source</a>
+                    <a href="https://github.com/vrm-c/UniVRM/blob/master/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs/#L14" class="contribution-link">View Source</a>
                   </li>
                 </ul>
               </div>
diff --git a/manifest.json b/manifest.json
index 9dd298e1d..2701b25da 100644
--- a/manifest.json
+++ b/manifest.json
@@ -996,7 +996,7 @@
       "output": {
         ".html": {
           "relative_path": "api/UniGLTF.ImporterContext.html",
-          "hash": "zTRKDJtIgdlV9gSHBD3H/J4qx/Ct1+XWp3oRQ1ZAkm8="
+          "hash": "qz48AJsZseMBNC3DwGRvK33Jzr19pCv3TE+VrEVrM4s="
         }
       },
       "is_incremental": false,