diff --git a/AtsEx.PluginHost/Helpers/LoadErrorManager.cs b/AtsEx.PluginHost/Helpers/LoadErrorManager.cs
index 3644cd8b..08ce84b8 100644
--- a/AtsEx.PluginHost/Helpers/LoadErrorManager.cs
+++ b/AtsEx.PluginHost/Helpers/LoadErrorManager.cs
@@ -10,7 +10,25 @@ namespace Automatic9045.AtsEx.PluginHost.Helpers
 {
     public static partial class LoadErrorManager
     {
-        public static LoadErrorList Errors { get; } = new LoadErrorList();
+        static LoadErrorManager()
+        {
+            if (InstanceStore.IsInitialized)
+            {
+                Initialize();
+            }
+            else
+            {
+                InstanceStore.Initialized += e => Initialize();
+            }
+        }
+
+        private static void Initialize()
+        {
+            Errors = new LoadErrorList();
+        }
+
+
+        public static LoadErrorList Errors { get; private set; }
 
 
         public static void Throw(string text, string senderFileName, int lineIndex, int charIndex)
diff --git a/AtsEx.PluginHost/InstanceStore.cs b/AtsEx.PluginHost/InstanceStore.cs
index ef6d3d4d..69f4503a 100644
--- a/AtsEx.PluginHost/InstanceStore.cs
+++ b/AtsEx.PluginHost/InstanceStore.cs
@@ -8,6 +8,7 @@
 
 namespace Automatic9045.AtsEx.PluginHost
 {
+    internal delegate void InitializedEventHandler(EventArgs e);
     internal delegate void ClosingEventHandler(EventArgs e);
 
     public static class InstanceStore
@@ -20,6 +21,7 @@ public static class InstanceStore
         private static IBveHacker bveHacker;
         internal static IBveHacker BveHacker => IsInitialized ? bveHacker : throw new InvalidOperationException($"{nameof(InstanceStore)} は初期化されていません。");
 
+        internal static event InitializedEventHandler Initialized;
         internal static event ClosingEventHandler Closing;
 
         public static void Initialize(IApp app, IBveHacker bveHacker)
@@ -29,6 +31,8 @@ public static void Initialize(IApp app, IBveHacker bveHacker)
 
             InstanceStore.app = app;
             InstanceStore.bveHacker = bveHacker;
+
+            Initialized?.Invoke(EventArgs.Empty);
         }
 
         public static void Dispose()