diff --git a/ecs/jskult-webapp/src/util/sanitize.py b/ecs/jskult-webapp/src/util/sanitize.py
index 781dd593..3e052717 100644
--- a/ecs/jskult-webapp/src/util/sanitize.py
+++ b/ecs/jskult-webapp/src/util/sanitize.py
@@ -4,11 +4,18 @@ import html
 
 
 def sanitize(cls):
-    class SanitizedClass(cls):
-        def __init__(self, *args, **kwargs):
-            super().__init__(*args, **kwargs)
-            for prop_name, prop_value in self.__dict__.items():
-                if isinstance(prop_value, str):
-                    sanitized_value = html.escape(prop_value, quote=True)
-                    setattr(self, prop_name, sanitized_value)
-    return SanitizedClass
+    original_init = cls.__init__
+
+    def new_init(self, *args, **kwargs):
+        # オリジナルの __init__ メソッドを呼び出してインスタンスを初期化
+        sanitized_kwargs = {**kwargs}
+        for key, value in kwargs.items():
+            if isinstance(value, str):
+                # 文字列の場合はサニタイズ処理を行う（例：HTMLタグをエスケープ）
+                sanitized_value = html.escape(value, quote=True)
+                sanitized_kwargs[key] = sanitized_value
+        original_init(self, *args, **sanitized_kwargs)
+
+    cls.__init__ = new_init
+
+    return cls