diff --git a/Assets/VRM10/Runtime/IO/Vrm10.cs b/Assets/VRM10/Runtime/IO/Vrm10.cs
index 80e6fa31a..fc636e5c5 100644
--- a/Assets/VRM10/Runtime/IO/Vrm10.cs
+++ b/Assets/VRM10/Runtime/IO/Vrm10.cs
@@ -52,7 +52,11 @@ namespace UniVRM10
                 ? new RuntimeOnlyAwaitCaller()
                 : new ImmediateCaller();
 
-            using var gltfData = new GlbLowLevelParser(path, File.ReadAllBytes(path)).Parse();
+            using var gltfData = await awaitCaller.Run(() =>
+            {
+                var bytes = File.ReadAllBytes(path);
+                return new GlbLowLevelParser(path, bytes).Parse();
+            });
             return await LoadAsync(
                 gltfData,
                 canLoadVrm0X,
@@ -96,7 +100,7 @@ namespace UniVRM10
                 ? new RuntimeOnlyAwaitCaller()
                 : new ImmediateCaller();
 
-            using var gltfData = new GlbLowLevelParser(string.Empty, bytes).Parse();
+            using var gltfData = await awaitCaller.Run(() => new GlbLowLevelParser(string.Empty, bytes).Parse());
             return await LoadAsync(
                 gltfData,
                 canLoadVrm0X,
diff --git a/Assets/VRM10/Tests/Vrm10ApiTests.cs b/Assets/VRM10/Tests/Vrm10ApiTests.cs
new file mode 100644
index 000000000..d29dcd45c
--- /dev/null
+++ b/Assets/VRM10/Tests/Vrm10ApiTests.cs
@@ -0,0 +1,20 @@
+using NUnit.Framework;
+using VRMShaders;
+
+namespace UniVRM10.Test
+{
+    public sealed class Vrm10ApiTests
+    {
+        [Test]
+        public void LoadImmediately()
+        {
+            var loadTask = Vrm10.LoadPathAsync(
+                TestAsset.AliciaPath,
+                canLoadVrm0X: true,
+                awaitCaller: new ImmediateCaller()
+            );
+
+            Assert.AreEqual(true, loadTask.IsCompleted);
+        }
+    }
+}
\ No newline at end of file
diff --git a/Assets/VRM10/Tests/Vrm10ApiTests.cs.meta b/Assets/VRM10/Tests/Vrm10ApiTests.cs.meta
new file mode 100644
index 000000000..0cda7db50
--- /dev/null
+++ b/Assets/VRM10/Tests/Vrm10ApiTests.cs.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 6bf6de3c68bf4a5994e2b5739f60b913
+timeCreated: 1716261790
\ No newline at end of file