diff --git a/Packages/enitimeago.non-destructive-mmd/Editor/BlendShapeMappingsEditor.cs b/Packages/enitimeago.non-destructive-mmd/Editor/BlendShapeMappingsEditor.cs
index d43f526..7d0f14c 100644
--- a/Packages/enitimeago.non-destructive-mmd/Editor/BlendShapeMappingsEditor.cs
+++ b/Packages/enitimeago.non-destructive-mmd/Editor/BlendShapeMappingsEditor.cs
@@ -136,7 +136,8 @@ public override void OnInspectorGUI()
             if (GUILayout.Button(L.Tr("MappingsEditor:ShareMenuLabel")))
             {
                 var menu = new GenericMenu();
-                menu.AddItem(new GUIContent(L.Tr("MappingsEditor:ShareAsUnitypackage")), false, () => ExportPackage(data));
+                menu.AddItem(new GUIContent(L.Tr("MappingsEditor:ShareAsUnitypackage")), false, () => ExportAsPackage(data));
+                menu.AddItem(new GUIContent(L.Tr("MappingsEditor:ExportAsJson")), false, () => ExportAsJson(data, SafeFilename(avatar.name)));
                 menu.ShowAsContext();
             }
             GUI.enabled = true;
@@ -161,14 +162,39 @@ public override void OnInspectorGUI()
             }
         }
 
-        private void ExportPackage(BlendShapeMappings mappingsComponent)
+        private string SafeFilename(string name)
+        {
+            foreach (char c in Path.GetInvalidFileNameChars())
+            {
+                name = name.Replace(c, '_');
+            }
+            return name;
+        }
+
+        private void ExportAsJson(BlendShapeMappings mappingsComponent, string defaultName)
+        {
+            string jsonPath = EditorUtility.SaveFilePanel(
+                L.Tr("SaveFilePanel:SaveJson"),
+                "",
+                defaultName,
+                "json");
+            if (string.IsNullOrEmpty(jsonPath))
+            {
+                return;
+            }
+
+            string json = JsonUtility.ToJson(mappingsComponent, prettyPrint: true);
+
+            File.WriteAllText(jsonPath, json);
+        }
+
+        private void ExportAsPackage(BlendShapeMappings mappingsComponent)
         {
             string packagePath = EditorUtility.SaveFilePanel(
                 L.Tr("SaveFilePanel:SaveUnitypackage"),
                 "",
                 "",
                 "unitypackage");
-
             if (string.IsNullOrEmpty(packagePath))
             {
                 return;
diff --git a/Packages/enitimeago.non-destructive-mmd/Editor/Localization/en-us.po b/Packages/enitimeago.non-destructive-mmd/Editor/Localization/en-us.po
index 718e177..d7881eb 100644
--- a/Packages/enitimeago.non-destructive-mmd/Editor/Localization/en-us.po
+++ b/Packages/enitimeago.non-destructive-mmd/Editor/Localization/en-us.po
@@ -68,6 +68,9 @@ msgstr "More..."
 msgid "MappingsEditor:ShareAsUnitypackage"
 msgstr "Share as .unitypackage..."
 
+msgid "MappingsEditor:ExportAsJson"
+msgstr "Export as .json..."
+
 msgid "MappingsEditor:ShowStoredData"
 msgstr "Show stored data"
 
@@ -152,6 +155,9 @@ msgstr "OK"
 msgid "SaveFilePanel:SaveUnitypackage"
 msgstr "Save .unitypackage"
 
+msgid "SaveFilePanel:SaveJson"
+msgstr "Save .json"
+
 msgid "WriteDefaultsComponentEditor:ForceAvatarWriteDefaultsOn"
 msgstr "Force all FX Write Defaults ON"
 
diff --git a/Packages/enitimeago.non-destructive-mmd/Editor/Localization/ja-jp.po b/Packages/enitimeago.non-destructive-mmd/Editor/Localization/ja-jp.po
index 4ec0927..66bf7d6 100644
--- a/Packages/enitimeago.non-destructive-mmd/Editor/Localization/ja-jp.po
+++ b/Packages/enitimeago.non-destructive-mmd/Editor/Localization/ja-jp.po
@@ -68,6 +68,9 @@ msgstr "その他..."
 msgid "MappingsEditor:ShareAsUnitypackage"
 msgstr ".unitypackageで共有する..."
 
+msgid "MappingsEditor:ExportAsJson"
+msgstr ".jsonでエクスポートする..."
+
 msgid "MappingsEditor:ShowStoredData"
 msgstr "保存データを表示"