diff --git a/Scripts/Format/VRMImporterContext.cs b/Scripts/Format/VRMImporterContext.cs
index 4be74a047..e73bcb11f 100644
--- a/Scripts/Format/VRMImporterContext.cs
+++ b/Scripts/Format/VRMImporterContext.cs
@@ -152,6 +152,7 @@ namespace VRM
             {
                 asset.BlendShapeName = groupName;
                 asset.Preset = EnumUtil.TryParseOrDefault<BlendShapePreset>(group.presetName);
+                asset.IsBinary = group.isBinary;
                 if (asset.Preset == BlendShapePreset.Unknown)
                 {
                     // fallback
@@ -250,7 +251,7 @@ namespace VRM
             AvatarDescription = GLTF.extensions.VRM.humanoid.ToDescription(Nodes);
             AvatarDescription.name = "AvatarDescription";
             HumanoidAvatar = AvatarDescription.CreateAvatar(Root.transform);
-            if(!HumanoidAvatar.isValid || !HumanoidAvatar.isHuman)
+            if (!HumanoidAvatar.isValid || !HumanoidAvatar.isHuman)
             {
                 throw new Exception("fail to create avatar");
             }
@@ -289,7 +290,7 @@ namespace VRM
             meta.Title = gltfMeta.title;
 
             var thumbnail = GetTexture(gltfMeta.texture);
-            if (thumbnail!=null)
+            if (thumbnail != null)
             {
                 // ロード済み
                 meta.Thumbnail = thumbnail.Texture;
diff --git a/Scripts/Format/glTF_VRM_BlendShape.cs b/Scripts/Format/glTF_VRM_BlendShape.cs
index 522051d6a..7338872c2 100644
--- a/Scripts/Format/glTF_VRM_BlendShape.cs
+++ b/Scripts/Format/glTF_VRM_BlendShape.cs
@@ -91,7 +91,7 @@ namespace VRM
         [JsonSchema(Description = "Expression name")]
         public string name;
 
-        [JsonSchema(Description = "Predefined Expression name", EnumValues =new object[] {
+        [JsonSchema(Description = "Predefined Expression name", EnumValues = new object[] {
             "unknown",
             "neutral",
             "a",
@@ -119,10 +119,14 @@ namespace VRM
         [JsonSchema(Description = "Material animation references.")]
         public List<glTF_VRM_MaterialValueBind> materialValues = new List<glTF_VRM_MaterialValueBind>();
 
+        [JsonSchema(Description = "0 or 1. Do not allow an intermediate value. Value should rounded")]
+        public bool isBinary;
+
         protected override void SerializeMembers(GLTFJsonFormatter f)
         {
             f.KeyValue(() => name);
             f.KeyValue(() => presetName);
+            f.KeyValue(() => isBinary);
             f.KeyValue(() => binds);
             f.KeyValue(() => materialValues);
         }
@@ -157,6 +161,7 @@ namespace VRM
             {
                 name = clip.BlendShapeName,
                 presetName = clip.Preset.ToString().ToLower(),
+                isBinary = clip.IsBinary,
                 binds = list,
                 materialValues = materialList,
             };