diff --git a/ecs/jskult-batch-daily/src/batch/laundering/emp_chg_inst_laundering.py b/ecs/jskult-batch-daily/src/batch/laundering/emp_chg_inst_laundering.py
index a9d5f1f3..f78ece9b 100644
--- a/ecs/jskult-batch-daily/src/batch/laundering/emp_chg_inst_laundering.py
+++ b/ecs/jskult-batch-daily/src/batch/laundering/emp_chg_inst_laundering.py
@@ -101,39 +101,29 @@ def _update_emp_chg_inst_lau_from_v_inst_merge_t(db: Database):
 
     logger.info('v_inst_merge_t Table Data is exists!')
     # v_inst_merge_t から、emp_chg_inst_lauをUpdateします
-    result = db.execute_select(
+    logger.debug("##########################")
+    logger.debug("#### UPDATE DATA #########")
+    logger.debug("##########################")
+    try:
+        elapsed_time = ElapsedTime()
+        update_sql = """
+            UPDATE
+                src05.emp_chg_inst_lau el, internal05.v_inst_merge_t vimt
+            SET
+                el.inst_cd = vimt.v_inst_cd_merge,
+                el.lua_ope_dt = SYSDATE()
+            WHERE
+                el.inst_cd = vimt.v_inst_cd
         """
-        SELECT
-            v_inst_cd,
-            v_inst_cd_merge
-        FROM
-            internal05.v_inst_merge_t
-        """
-    )
-    for row in result:
-        v_inst_cd = row['v_inst_cd']
-        v_inst_cd_merge = row['v_inst_cd_merge']
-        try:
-            elapsed_time = ElapsedTime()
-            update_sql = """
-                UPDATE
-                    src05.emp_chg_inst_lau
-                SET
-                    inst_cd = :v_inst_cd_merge,
-                    lua_ope_dt = SYSDATE()
-                WHERE
-                    inst_cd = :v_inst_cd;
-            """
-            update_result = db.execute(
-                update_sql,
-                {'v_inst_cd': v_inst_cd, 'v_inst_cd_merge': v_inst_cd_merge}
-            )
-            logging_sql(logger, update_sql)
-            logger.info(f'Query OK, {update_result.rowcount} rows affected ({elapsed_time.of})')
-        except Exception as e:
-            logger.debug(f"emp_chg_inst_lau v_inst_cd could not set from {v_inst_cd} to {v_inst_cd_merge}!")
-            raise e
-        logger.debug(f"Success! emp_chg_inst_lau v_inst_cd was set from {v_inst_cd} to {v_inst_cd_merge}!")
+        res = db.execute(update_sql)
+        logging_sql(logger, update_sql)
+        logger.info(f'Query OK, {res.rowcount} rows affected ({elapsed_time.of})')
+    except Exception as e:
+        logger.debug("emp_chg_inst_lau.v_inst_cd could not set!")
+        raise e
+
+    logger.debug("emp_chg_inst_lau.v_inst_cd was set!")
+
     return