diff --git a/ecs/jskult-transfer-receive-file/src/aws/s3.py b/ecs/jskult-transfer-receive-file/src/aws/s3.py
index 015992b4..a726c1c3 100644
--- a/ecs/jskult-transfer-receive-file/src/aws/s3.py
+++ b/ecs/jskult-transfer-receive-file/src/aws/s3.py
@@ -1,11 +1,7 @@
-import gzip
 import json
-import os
-import os.path as path
-import shutil
-import tempfile
 
 import boto3
+
 from src.system_var import environment
 
 
@@ -20,7 +16,7 @@ class S3Client:
             return []
         contents = response['Contents']
         # 末尾がスラッシュで終わるものはフォルダとみなしてスキップする
-        objects = [{'filename': content['Key'], 'size': content['Size']}
+        objects = [content['Key']
                    for content in contents if not content['Key'].endswith('/')]
         return objects
 
@@ -60,46 +56,26 @@ class JskIOBucket(S3Bucket):
             self._bucket_name, self._recv_folder)
         return self._s3_file_list
 
-    def download_data_file(self, data_filename: str):
-        temporary_dir = tempfile.mkdtemp()
-        temporary_file_path = path.join(
-            temporary_dir, f'{data_filename.replace(f"{self._recv_folder}/", "")}')
-        with open(temporary_file_path, mode='wb') as f:
-            self._s3_client.download_file(self._bucket_name, data_filename, f)
-            f.seek(0)
-        return temporary_file_path
-
-    def unzip_data_file(self, filename: str):
-        temp_dir = os.path.dirname(filename)
-        decompress_filename = os.path.basename(filename).replace('.gz', '')
-        decompress_file_path = os.path.join(temp_dir, decompress_filename)
-        with gzip.open(filename, 'rb') as gz:
-            with open(decompress_file_path, 'wb') as decompressed_file:
-                shutil.copyfileobj(gz, decompressed_file)
-
-        ret = [decompress_file_path]
-        return ret
-
-    def transfer_file_to_import(self, target_file: dict):
+    def transfer_file_to_import(self, target_file: str):
         data_import_bucket = DataImportBucket()
-        transfer_from_file_path = target_file.get("filename")
+        transfer_from_file_path = target_file
         transfer_to_filename = transfer_from_file_path.replace(
             f"{self._recv_folder}/", "")
         data_import_key = f'{data_import_bucket._folder}/{transfer_to_filename}'
         self._s3_client.copy(self._bucket_name, transfer_from_file_path,
                              data_import_bucket._bucket_name, data_import_key)
 
-    def backup_file(self, target_file: dict, datetime_key: str):
+    def backup_file(self, target_file: str, datetime_key: str):
         jsk_backup_bucket = JskBackupBucket()
-        backup_from_file_path = target_file.get("filename")
+        backup_from_file_path = target_file
         backup_to_filename = backup_from_file_path.replace(
             f"{self._recv_folder}/", "")
         backup_key = f'{jsk_backup_bucket._folder}/{datetime_key}/{backup_to_filename}'
         self._s3_client.copy(self._bucket_name, backup_from_file_path,
                              jsk_backup_bucket._bucket_name, backup_key)
 
-    def delete_file(self, target_file: dict):
-        delete_path = target_file.get("filename")
+    def delete_file(self, target_file: str):
+        delete_path = target_file
         self._s3_client.delete_file(
             self._bucket_name, delete_path)
 
@@ -116,16 +92,16 @@ class UltmarcBucket(S3Bucket):
     def get_file_list(self):
         return self._s3_client.list_objects(self._bucket_name, self._folder)
 
-    def backup_file(self, target_file: dict, datetime_key: str):
+    def backup_file(self, target_file: str, datetime_key: str):
         # バックアップバケットにコピー
         ultmarc_backup_bucket = UltmarcBackupBucket()
-        target_file_path = target_file.get("filename")
+        target_file_path = target_file
         backup_key = f'{ultmarc_backup_bucket._folder}/{datetime_key}/{target_file_path.replace(f"{self._folder}/", "")}'
         self._s3_client.copy(self._bucket_name, target_file_path,
                              ultmarc_backup_bucket._bucket_name, backup_key)
 
-    def delete_file(self, target_file: dict):
-        delete_path = target_file.get("filename")
+    def delete_file(self, target_file: str):
+        delete_path = target_file
         self._s3_client.delete_file(
             self._bucket_name, delete_path)
 
@@ -134,8 +110,8 @@ class UltmarcImportBucket(S3Bucket):
     _bucket_name = environment.ULTMARC_DATA_BUCKET
     _folder = environment.ULTMARC_IMPORT_FOLDER
 
-    def transfer_file_to_import(self, target_file: dict):
-        from_file_path = target_file.get("filename")
+    def transfer_file_to_import(self, target_file: str):
+        from_file_path = target_file
         to_filename = from_file_path.replace(
             f"{UltmarcBucket()._folder}/", "")
         data_import_key = f'{self._folder}/{to_filename}'