diff --git a/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_texture_basisu.cs b/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_texture_basisu.cs
index 6b8ef550c..5d14f1f95 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_texture_basisu.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_texture_basisu.cs
@@ -4,6 +4,8 @@ using UniJSON;
 namespace UniGLTF
 {
     /// <summary>
+    /// `texture` に対する extension.
+    ///
     /// https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_texture_basisu
     /// </summary>
     [Serializable]
@@ -19,9 +21,9 @@ namespace UniGLTF
         [JsonSchema(Minimum = 0)]
         public int source = -1;
 
-        public static bool TryGet(glTFTextureInfo textureInfo, out glTF_KHR_texture_basisu basisuExtension)
+        public static bool TryGet(glTFTexture texture, out glTF_KHR_texture_basisu basisuExtension)
         {
-            if (textureInfo?.extensions is glTFExtensionImport importedExtensions)
+            if (texture?.extensions is glTFExtensionImport importedExtensions)
             {
                 foreach (var kv in importedExtensions.ObjectItems())
                 {
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_texture_transform.cs b/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_texture_transform.cs
index fc57616c8..2a2f634d6 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_texture_transform.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_texture_transform.cs
@@ -5,6 +5,11 @@ using UniJSON;
 
 namespace UniGLTF
 {
+    /// <summary>
+    /// material が参照する `textureInfo` に対する extension.
+    ///
+    /// https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_texture_transform
+    /// </summary>
     [Serializable]
     public class glTF_KHR_texture_transform
     {