diff --git a/gokart/task.py b/gokart/task.py
index a7f7a06d..1ef1e569 100644
--- a/gokart/task.py
+++ b/gokart/task.py
@@ -540,13 +540,15 @@ def _get_module_versions(self) -> str:
 
     def __repr__(self):
         """
-        Build a task representation like `MyTask(param1=1.5, param2='5', data_task=DataTask(id=35tyi))`
+        Build a task representation like
+        `MyTask[aca2f28555dadd0f1e3dee3d4b973651](param1=1.5, param2='5', data_task=DataTask(c1f5d06aa580c5761c55bd83b18b0b4e))`
         """
         return self._get_task_string()
 
     def __str__(self):
         """
-        Build a human-readable task representation like `MyTask(param1=1.5, param2='5', data_task=DataTask(id=35tyi))`
+        Build a human-readable task representation like
+        `MyTask[aca2f28555dadd0f1e3dee3d4b973651](param1=1.5, param2='5', data_task=DataTask(c1f5d06aa580c5761c55bd83b18b0b4e))`
         This includes only public parameters
         """
         return self._get_task_string(only_public=True)
@@ -566,7 +568,7 @@ def _get_task_string(self, only_public=False):
             if param_obj.significant and ((not only_public) or param_obj.visibility == ParameterVisibility.PUBLIC):
                 repr_parts.append(f'{param_name}={self._make_representation(param_obj, param_value)}')
 
-        task_str = f'{self.get_task_family()}({", ".join(repr_parts)})'
+        task_str = f'{self.get_task_family()}[{self.make_unique_id()}]({", ".join(repr_parts)})'
         return task_str
 
     def _make_representation(self, param_obj: luigi.Parameter, param_value):