diff --git a/rog/services/csv_processor.py b/rog/services/csv_processor.py
index d719f86..1919508 100644
--- a/rog/services/csv_processor.py
+++ b/rog/services/csv_processor.py
@@ -250,10 +250,12 @@ class EntryCSVProcessor:
                 event.end_datetime = timezone.make_aware(datetime(2025, 1, 25, 17, 0))
                 event.save()
 
-            # 日付が必要な場合のフォールバック
-            entry_date = self.date_converter.convert_date(row['entry_date'])
-            if entry_date:
-                entry_date = entry_date.replace(hour=9, minute=0)
+            # entry_dateをdatetimeに変換
+            if 'entry_date' in row:
+                try:
+                    entry_date = datetime.strptime(row['entry_date'], '%Y/%m/%d %H:%M:%S')
+                except ValueError:
+                    entry_date = datetime.strptime(row['entry_date'], '%Y/%m/%d')
             else:
                 entry_date = event.start_datetime