diff --git a/.gitignore b/.gitignore
index b694934..93f6cb6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,5 @@
-.venv
\ No newline at end of file
+.venv
+.direnv
+scores.db
+__pycache__
+*.pyc
\ No newline at end of file
diff --git a/turn-into-sqlite.py b/turn-into-sqlite.py
new file mode 100644
index 0000000..ca4b7d7
--- /dev/null
+++ b/turn-into-sqlite.py
@@ -0,0 +1,58 @@
+from git import Repo, RefLog
+from io import BytesIO, StringIO, TextIOWrapper
+import pandas as pd
+from utils import to_jst_timestamp
+import sqlite3
+
+db = sqlite3.connect("./scores.db")
+
+c = db.cursor()
+c.execute("""
+CREATE TABLE IF NOT EXISTS "scores" (
+  "Song ID" TEXT,
+  "Time Played" TIMESTAMP,
+  "Song Name" TEXT,
+  "Difficulty" TEXT,
+  "Rating" INTEGER,
+  "Score" INTEGER,
+  "Grade" TEXT,
+  "Lamp" TEXT,
+  "Time Uploaded" TEXT,
+  PRIMARY KEY ("Song ID", "Time Played")
+);
+""")
+
+repo = Repo(".")
+log_output = repo.git.log('--pretty=%H', '--follow', '--', 'data/output.csv').split('\n')
+commits = [repo.rev_parse(commit_hash) for commit_hash in log_output]
+
+for commit in commits:
+    files = commit.tree.traverse()
+    files = list(filter(lambda e: e.path == "data/output.csv", files))
+    if not files: continue
+    file = files[0]
+    data = BytesIO()
+    file.stream_data(data)
+    data.seek(0)
+    reader = TextIOWrapper(data, encoding='utf-8')
+    df = pd.read_csv(reader, delimiter='\t')
+    df = df[df['Time Played'].notna()]
+    df['Time Played'] = df['Time Played'].map(to_jst_timestamp)
+    df.set_index(['Song ID', 'Time Played'], inplace=True)
+    def insert(pd_table, conn, keys, data_iter):
+        data = list(data_iter)
+        # print(pd_table, keys, data)
+        query = ("""
+            INSERT 
+            INTO scores
+            (%s)
+            VALUES
+            (%s)
+            ON CONFLICT("Song ID", "Time Played") DO NOTHING
+        """ % (
+            ",".join(map(lambda x: repr(x), keys)),
+            ",".join(map(lambda _: "?", keys))
+        ))
+        # print(query)
+        conn.executemany(query, data)
+    df.to_sql("scores", con=db, if_exists="append", method=insert)
diff --git a/utils.py b/utils.py
new file mode 100644
index 0000000..dccfcc3
--- /dev/null
+++ b/utils.py
@@ -0,0 +1,12 @@
+from datetime import datetime
+import pytz
+
+JST = pytz.timezone("Asia/Tokyo")
+CST = pytz.timezone("America/Chicago")
+
+def to_jst_timestamp(s: str, format_str="%Y-%m-%d %H:%M:%S"):
+    if type(s) is not str: return None
+    naive_dt = datetime.strptime(s, format_str)
+    jst_dt = JST.localize(naive_dt)
+    cst_dt = jst_dt.astimezone(CST)
+    return cst_dt