diff --git a/ecs/jskult-batch-daily/src/batch/vjsk/vjsk_recv_file_mapper.py b/ecs/jskult-batch-daily/src/batch/vjsk/vjsk_recv_file_mapper.py
index 6162d07f..ae1f8529 100644
--- a/ecs/jskult-batch-daily/src/batch/vjsk/vjsk_recv_file_mapper.py
+++ b/ecs/jskult-batch-daily/src/batch/vjsk/vjsk_recv_file_mapper.py
@@ -950,6 +950,7 @@ class VjskReceiveFileMapper:
                     ,merge_reason
                     ,dwh_upd_dt
                 )
+                -- NULLに変換する対象のカラムはない
                 SELECT
                     t.v_inst_cd
                     ,t.v_inst_cd_merg
diff --git a/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/test_vjsk_load.py b/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/test_vjsk_load.py
index 0da0f4ab..87510db7 100644
--- a/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/test_vjsk_load.py
+++ b/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/test_vjsk_load.py
@@ -351,6 +351,7 @@ class TestImportFileToDb:
         # teardown
 
     def test_load_04_vop_hco_merge_ok(self, mapper):
+        # V施設統合マスタにはNULL変換対象の文字列型カラムがない
         table_name_org = mapper.get_org_table(mapper.CONDKEY_VOP_HCO_MERGE)
         table_name_src = mapper.get_src_table(mapper.CONDKEY_VOP_HCO_MERGE)