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 07188070..7371a860 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
@@ -905,6 +905,7 @@ class VjskReceiveFileMapper:
                     ,dwh_upd_dt
                 )
                 SELECT
+                -- NULLに変換する対象のカラムはない
                     t.phm_prd_cd
                     ,t.phm_price_kind
                     ,t.sub_num
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 16d5db0c..24edf2a1 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
@@ -805,6 +805,7 @@ class TestImportFileToDb:
         # teardown
 
     def test_load_11_phm_price_mst_ok(self, mapper):
+        # V製品価格マスタには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_PHM_PRICE_MST)
         table_name_src = mapper.get_src_table(mapper.CONDKEY_PHM_PRICE_MST)