diff --git a/cinder/volume/drivers/hitachi/hbsd_rest_api.py b/cinder/volume/drivers/hitachi/hbsd_rest_api.py
index d47d779cfe8..8bdcb685d08 100644
--- a/cinder/volume/drivers/hitachi/hbsd_rest_api.py
+++ b/cinder/volume/drivers/hitachi/hbsd_rest_api.py
@@ -537,6 +537,7 @@ class RestApiClient():
                                  timeout=self.conf.hitachi_lock_timeout)
         if not err:
             self.set_my_session(self.Session(rsp["sessionId"], rsp["token"]))
+            self.nested_count = 0
             return True
         else:
             return False
@@ -574,6 +575,7 @@ class RestApiClient():
                 retry = self._has_session()
                 if not retry:
                     LOG.debug("Trying to re-login.")
+                    self.nested_count = 0
                     retry = self._login(do_raise=False)
                 if not retry:
                     self.output_log(
diff --git a/releasenotes/notes/hitachi-fix-unlock-f4e044807985e60b.yaml b/releasenotes/notes/hitachi-fix-unlock-f4e044807985e60b.yaml
new file mode 100644
index 00000000000..43d46e295b7
--- /dev/null
+++ b/releasenotes/notes/hitachi-fix-unlock-f4e044807985e60b.yaml
@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Hitachi driver `bug #2033448
+    <https://bugs.launchpad.net/cinder/+bug/2033448>`_: Fixed to initialize
+    lock counter for resource group