diff --git a/ecs/jskult-webapp/src/model/db/user_master.py b/ecs/jskult-webapp/src/model/db/user_master.py
index 879cd008..d86253ae 100644
--- a/ecs/jskult-webapp/src/model/db/user_master.py
+++ b/ecs/jskult-webapp/src/model/db/user_master.py
@@ -2,6 +2,7 @@ from datetime import datetime
 from typing import Optional
 
 from src.model.db.base_db_model import BaseDBModel
+from src.system_var import constants
 
 class UserMasterModel(BaseDBModel):
     user_id: Optional[str]
@@ -34,4 +35,7 @@ class UserMasterModel(BaseDBModel):
         return self.mntuser_flg == '1'
 
     def is_groupware_user(self):
-        return self.mntuser_flg == '0' or self.mntuser_flg is None
\ No newline at end of file
+        return self.mntuser_flg == '0' or self.mntuser_flg is None
+
+    def is_login_failed_limit_exceeded(self):
+        return self.mntuser_login_failed_cnt >= constants.LOGIN_FAIL_LIMIT
\ No newline at end of file
diff --git a/ecs/jskult-webapp/src/repositories/user_master_repository.py b/ecs/jskult-webapp/src/repositories/user_master_repository.py
index 0516ec79..dcb10aa9 100644
--- a/ecs/jskult-webapp/src/repositories/user_master_repository.py
+++ b/ecs/jskult-webapp/src/repositories/user_master_repository.py
@@ -35,8 +35,14 @@ class UserMasterRepository(BaseRepository):
             SET 
                 mntuser_login_failed_cnt = 
                     CASE 
-                        WHEN DATE(mntuser_last_login_failed_datetime) = CURRENT_DATE() THEN mntuser_login_failed_cnt + 1
-                        ELSE 1
+                        WHEN 
+                            DATE(mntuser_last_login_failed_datetime) = CURRENT_DATE() 
+                        OR 
+                            mntuser_login_failed_cnt >= 10
+                        THEN 
+                            mntuser_login_failed_cnt + 1
+                        ELSE 
+                            1
                     END, 
                 mntuser_last_login_failed_datetime = CURRENT_TIMESTAMP() 
             WHERE 
diff --git a/ecs/jskult-webapp/src/services/login_service.py b/ecs/jskult-webapp/src/services/login_service.py
index fa75b5bf..2ea0724a 100644
--- a/ecs/jskult-webapp/src/services/login_service.py
+++ b/ecs/jskult-webapp/src/services/login_service.py
@@ -59,7 +59,7 @@ class LoginService(BaseService):
         user_record: UserMasterModel = self.user_repository.fetch_one({'user_id': user_id})
         if user_record is None:
             return False
-        return user_record.mntuser_login_failed_cnt >= constants.LOGIN_FAIL_LIMIT
+        return user_record.is_login_failed_limit_exceeded()
 
     def __secret_hash(self, username: str):
         # see - https://aws.amazon.com/jp/premiumsupport/knowledge-center/cognito-unable-to-verify-secret-hash/  # noqa