diff --git a/experiments/count_up_extension.py b/experiments/count_up_extension.py
new file mode 100644
index 0000000..7958e08
--- /dev/null
+++ b/experiments/count_up_extension.py
@@ -0,0 +1,62 @@
+import yaml
+import os
+app_home = os.path.abspath(os.path.join( os.path.dirname(os.path.abspath(__file__)) , ".." ))
+
+try:
+    settings = yaml.load(open(app_home + '/settings.yml','r'), Loader=yaml.SafeLoader)
+except:
+    print("Error: Cannnot open log file. Check your settings.")
+    logger.error("Cannnot open log file. Check your settings.")
+    sys.exit()
+
+logfile = settings['ACCESS_LOG_FILE_PATH']
+f = open(logfile, "r")
+
+read_log_num = 0
+equal_log_num = 0
+not_update_log_num = 0
+error_log_num = 0
+log1 = f.readline()
+path = log1.split(",")[1]
+filename = path.split("/")[-1]
+extensions = {}
+if ("." in filename):
+    ext = filename.split(".")[-1]
+    extensions[ext] = 1
+    read_log_num += 1
+
+while len(log1) > 0:
+    try:
+        log2 = f.readline()
+        if log1 != log2:
+            log1 = log2
+            data = log1.split(",")
+            path = data[-2]
+            event = data[-1]
+            filename = path.split("/")[-1]
+            if (("." in filename) & (("Created" in event) | ("Updated" in event))):
+                ext = filename.split(".")[-1]
+                read_log_num += 1
+                if extensions.get(ext):
+                    extensions[ext] += 1
+                else:
+                    extensions[ext] = 1
+            else:
+                not_update_log_num += 1
+        else:
+            equal_log_num += 1
+    except:
+        # print(log1)   # エラーがあったファイルアクセス履歴を見る際に使用
+        error_log_num += 1
+
+print("read_log_num :\t"+str(read_log_num))
+print("not_update_log_num :\t"+str(not_update_log_num))
+print("equal_log_num :\t"+str(equal_log_num))
+print("error_log_num :\t"+str(error_log_num-1)+"\n")
+
+write_file = open(app_home + "/db/extension.csv", "w")
+sort_extentsions = sorted(extensions.items(), key=lambda x:x[1], reverse=True)
+count = 0
+for ext in sort_extentsions:
+    count += ext[1]
+    write_file.write(str(ext[0])+","+str(ext[1])+"\n")