diff --git a/.gitignore b/.gitignore
index 6d44399..3b79d0f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,6 +36,7 @@ $RECYCLE.BIN/
 .Trashes
 
 .vscode
+*.pyc
 
 # Directories potentially created on remote AFP share
 .AppleDB
@@ -50,3 +51,4 @@ version.json
 public/index.html
 config.json
 public/assets/song_skins
+secret.txt
diff --git a/app.py b/app.py
index d1ecbe3..569631f 100644
--- a/app.py
+++ b/app.py
@@ -1,39 +1,65 @@
-#!/usr/bin/env python2
-
-from __future__ import division
+#!/usr/bin/env python3
 
+import bcrypt
 import json
-import sqlite3
 import re
+import schema
 import os
-from flask import Flask, g, jsonify, render_template, request, abort, redirect
+
+from functools import wraps
+from flask import Flask, g, jsonify, render_template, request, abort, redirect, session
 from flask_caching import Cache
+from flask_session import Session
 from ffmpy import FFmpeg
+from pymongo import MongoClient
 
 app = Flask(__name__)
-try:
-    app.cache = Cache(app, config={'CACHE_TYPE': 'redis'})
-except RuntimeError:
-    import tempfile
-    app.cache = Cache(app, config={'CACHE_TYPE': 'filesystem', 'CACHE_DIR': tempfile.gettempdir()})
+client = MongoClient()
+
+try:
+    app.secret_key = open('secret.txt').read().strip()
+except FileNotFoundError:
+    app.secret_key = os.urandom(24).hex()
+    with open('secret.txt', 'w') as fp:
+        fp.write(app.secret_key)
+        fp.close()
+
+app.config['SESSION_TYPE'] = 'redis'
+app.cache = Cache(app, config={'CACHE_TYPE': 'redis'})
+sess = Session()
+sess.init_app(app)
+
+db = client.taiko
+db.users.create_index('username', unique=True)
 
-DATABASE = 'taiko.db'
 DEFAULT_URL = 'https://github.com/bui/taiko-web/'
 
 
-def get_db():
-    db = getattr(g, '_database', None)
-    if db is None:
-        db = g._database = sqlite3.connect(DATABASE)
-        db.row_factory = sqlite3.Row
-    return db
+def api_error(message):
+    return jsonify({'status': 'error', 'message': message})
 
 
-def query_db(query, args=(), one=False):
-    cur = get_db().execute(query, args)
-    rv = cur.fetchall()
-    cur.close()
-    return (rv[0] if rv else None) if one else rv
+def login_required(f):
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+        if not session.get('username'):
+            return api_error('not_logged_in')
+        return f(*args, **kwargs)
+    return decorated_function
+
+
+def admin_required(f):
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+        if not session.get('username'):
+            return abort(403)
+
+        user = db.users.find_one({'username': session.get('username')})
+        if user['user_level'] < 100:
+            return abort(403)
+
+        return f(*args, **kwargs)
+    return decorated_function
 
 
 def get_config():
@@ -72,13 +98,6 @@ def get_version():
     return version
 
 
-@app.teardown_appcontext
-def close_connection(exception):
-    db = getattr(g, '_database', None)
-    if db is not None:
-        db.close()
-
-
 @app.route('/')
 @app.cache.cached(timeout=15)
 def route_index():
@@ -86,6 +105,33 @@ def route_index():
     return render_template('index.html', version=version, config=get_config())
 
 
+@app.route('/admin')
+@admin_required
+def route_admin():
+    return redirect('/admin/songs')
+
+
+@app.route('/admin/songs')
+@admin_required
+def route_admin_songs():
+    songs = db.songs.find({})
+    return render_template('admin_songs.html', songs=list(songs))
+
+
+@app.route('/admin/songs/<int:id>')
+@admin_required
+def route_admin_songs_id(id):
+    song = db.songs.find_one({'id': id})
+    if not song:
+        return abort(404)
+
+    categories = list(db.categories.find({}))
+    song_skins = list(db.song_skins.find({}))
+
+    return render_template('admin_song_detail.html',
+        song=song, categories=categories, song_skins=song_skins)
+
+
 @app.route('/api/preview')
 @app.cache.cached(timeout=15, query_string=True)
 def route_api_preview():
@@ -93,12 +139,12 @@ def route_api_preview():
     if not song_id or not re.match('^[0-9]+$', song_id):
         abort(400)
 
-    song_row = query_db('select * from songs where id = ? and enabled = 1', (song_id,))
-    if not song_row:
+    song = db.songs.find_one({'id': song_id})
+    if not song:
         abort(400)
 
-    song_type = song_row[0]['type']
-    prev_path = make_preview(song_id, song_type, song_row[0]['preview'])
+    song_type = song['type']
+    prev_path = make_preview(song_id, song_type, song['preview'])
     if not prev_path:
         return redirect(get_config()['songs_baseurl'] + '%s/main.mp3' % song_id)
 
@@ -108,52 +154,30 @@ def route_api_preview():
 @app.route('/api/songs')
 @app.cache.cached(timeout=15)
 def route_api_songs():
-    songs = query_db('select s.*, m.name, m.url from songs s left join makers m on s.maker_id = m.maker_id where enabled = 1')
-    
-    raw_categories = query_db('select * from categories')
-    categories = {}
-    for cat in raw_categories:
-        categories[cat['id']] = cat['title']
-    
-    raw_song_skins = query_db('select * from song_skins')
-    song_skins = {}
-    for skin in raw_song_skins:
-        song_skins[skin[0]] = {'name': skin['name'], 'song': skin['song'], 'stage': skin['stage'], 'don': skin['don']}
-    
-    songs_out = []
+    songs = list(db.songs.find({'enabled': True}, {'_id': False, 'enabled': False}))
     for song in songs:
-        song_id = song['id']
-        song_type = song['type']
-        preview = song['preview']
-        
-        category_out = categories[song['category']] if song['category'] in categories else ''
-        song_skin_out = song_skins[song['skin_id']] if song['skin_id'] in song_skins else None
-        maker = None
-        if song['maker_id'] == 0:
-            maker = 0
-        elif song['maker_id'] and song['maker_id'] > 0:
-            maker = {'name': song['name'], 'url': song['url'], 'id': song['maker_id']}
-        
-        songs_out.append({
-            'id': song_id,
-            'title': song['title'],
-            'title_lang': song['title_lang'],
-            'subtitle': song['subtitle'],
-            'subtitle_lang': song['subtitle_lang'],
-            'stars': [
-                song['easy'], song['normal'], song['hard'], song['oni'], song['ura']
-            ],
-            'preview': preview,
-            'category': category_out,
-            'type': song_type,
-            'offset': song['offset'],
-            'song_skin': song_skin_out,
-            'volume': song['volume'],
-            'maker': maker,
-            'hash': song['hash']
-        })
+        if song['maker_id']:
+            if song['maker_id'] == 0:
+                song['maker'] = 0
+            else:
+                song['maker'] = db.makers.find_one({'id': song['maker_id']}, {'_id': False})
+        else:
+            song['maker'] = None
+        del song['maker_id']
 
-    return jsonify(songs_out)
+        if song['category_id']:
+            song['category'] = db.categories.find_one({'id': song['category_id']})['title']
+        else:
+            song['category'] = None
+        del song['category_id']
+
+        if song['skin_id']:
+            song['song_skin'] = db.song_skins.find_one({'id': song['skin_id']}, {'_id': False, 'id': False})
+        else:
+            song['song_skin'] = None
+        del song['skin_id']
+
+    return jsonify(songs)
 
 
 @app.route('/api/config')
@@ -163,6 +187,176 @@ def route_api_config():
     return jsonify(config)
 
 
+@app.route('/api/register', methods=['POST'])
+def route_api_register():
+    if session.get('username'):
+        return api_error('already_logged_in')
+
+    data = request.get_json()
+    if not schema.validate(data, schema.register):
+        return abort(400)
+
+    username = data.get('username', '')
+    if len(username) > 20 or not re.match('^[a-zA-Z0-9_]{1,20}$', username):
+        return api_error('invalid_username')
+
+    if db.users.find_one({'username_lower': username.lower()}):
+        return api_error('username_in_use')
+
+    password = data.get('password', '').encode('utf-8')
+    if not 8 <= len(password) <= 5000:
+        return api_error('invalid_password')
+
+    salt = bcrypt.gensalt()
+    hashed = bcrypt.hashpw(password, salt)
+
+    db.users.insert_one({
+        'username': username,
+        'username_lower': username.lower(),
+        'password': hashed,
+        'display_name':  username,
+        'user_level': 1
+    })
+
+    session['username'] = username
+    session.permanent = True
+    return jsonify({'status': 'ok', 'username': username, 'display_name': username})
+
+
+@app.route('/api/login', methods=['POST'])
+def route_api_login():
+    if session.get('username'):
+        return api_error('already_logged_in')
+
+    data = request.get_json()
+    if not schema.validate(data, schema.login):
+        return abort(400)
+
+    username = data.get('username', '')
+    result = db.users.find_one({'username_lower': username.lower()})
+    if not result:
+        return api_error('invalid_username_password')
+
+    password = data.get('password', '').encode('utf-8')
+    if not bcrypt.checkpw(password, result['password']):
+        return api_error('invalid_username_password')
+
+    session['username'] = result['username']
+    if data.get('remember'):
+        session.permanent = True
+
+    return jsonify({'status': 'ok', 'username': result['username'], 'display_name': result['display_name']})
+
+
+@app.route('/api/logout', methods=['POST'])
+@login_required
+def route_api_logout():
+    session.clear()
+    return jsonify({'status': 'ok'})
+
+
+@app.route('/api/account/display_name', methods=['POST'])
+@login_required
+def route_api_account_display_name():
+    data = request.get_json()
+    if not schema.validate(data, schema.update_display_name):
+        return abort(400)
+
+    display_name = data.get('display_name', '')
+    if not display_name or len(display_name) > 20:
+        return api_error('invalid_display_name')
+    
+    db.users.update_one({'username': session.get('username')}, {
+        '$set': {'display_name': display_name}
+    })
+
+    return jsonify({'status': 'ok'})
+
+
+@app.route('/api/account/password', methods=['POST'])
+@login_required
+def route_api_account_password():
+    data = request.get_json()
+    if not schema.validate(data, schema.update_password):
+        return abort(400)
+
+    user = db.users.find_one({'username': session.get('username')})
+    current_password = data.get('current_password', '').encode('utf-8')
+    if not bcrypt.checkpw(current_password, user['password']):
+        return api_error('current_password_invalid')
+    
+    new_password = data.get('new_password', '').encode('utf-8')
+    if not 8 <= len(new_password) <= 5000:
+        return api_error('invalid_password')
+    
+    salt = bcrypt.gensalt()
+    hashed = bcrypt.hashpw(new_password, salt)
+
+    db.users.update_one({'username': session.get('username')}, {
+        '$set': {'password': hashed}
+    })
+
+    return jsonify({'status': 'ok'})
+
+
+@app.route('/api/account/remove', methods=['POST'])
+@login_required
+def route_api_account_remove():
+    data = request.get_json()
+    if not schema.validate(data, schema.delete_account):
+        return abort(400)
+
+    user = db.users.find_one({'username': session.get('username')})
+    password = data.get('password', '').encode('utf-8')
+    if not bcrypt.checkpw(password, user['password']):
+        return api_error('current_password_invalid')
+
+    db.scores.delete_many({'username': session.get('username')})
+    db.users.delete_one({'username': session.get('username')})
+
+    session.clear()
+    return jsonify({'status': 'ok'})
+
+
+@app.route('/api/scores/save', methods=['POST'])
+@login_required
+def route_api_scores_save():
+    data = request.get_json()
+    if not schema.validate(data, schema.scores_save):
+        return abort(400)
+
+    username = session.get('username')
+    if data.get('is_import'):
+        db.scores.delete_many({'username': username})
+
+    scores = data.get('scores', [])
+    for score in scores:
+        db.scores.update_one({'username': username, 'hash': score['hash']},
+        {'$set': {
+            'username': username,
+            'hash': score['hash'],
+            'score': score['score']
+        }}, upsert=True)
+
+    return jsonify({'success': True})
+
+
+@app.route('/api/scores/get')
+@login_required
+def route_api_scores_get():
+    username = session.get('username')
+
+    scores = []
+    for score in db.scores.find({'username': username}):
+        scores.append({
+            'hash': score['hash'],
+            'score': score['score']
+        })
+
+    user = db.users.find_one({'username': username})
+    return jsonify({'scores': scores, 'username': user['username'], 'display_name': user['display_name']})
+
+
 def make_preview(song_id, song_type, preview):
     song_path = 'public/songs/%s/main.mp3' % song_id
     prev_path = 'public/songs/%s/preview.mp3' % song_id
diff --git a/config.example.json b/config.example.json
index 9bfd207..9ec88e4 100644
--- a/config.example.json
+++ b/config.example.json
@@ -1,4 +1,6 @@
 {
     "songs_baseurl": "",
-    "assets_baseurl": ""
+    "assets_baseurl": "",
+    "email": "",
+    "_accounts": true
 }
diff --git a/public/src/css/admin.css b/public/src/css/admin.css
new file mode 100644
index 0000000..5b2f22d
--- /dev/null
+++ b/public/src/css/admin.css
@@ -0,0 +1,125 @@
+body {
+    margin: 0;
+    font-family: 'Noto Sans JP', sans-serif;
+    background: #FF7F00;
+  }
+  
+  .nav {
+    margin: 0;
+    padding: 0;
+    width: 200px;
+    background-color: #A01300;
+    position: fixed;
+    height: 100%;
+    overflow: auto;
+  }
+  
+  .nav a {
+    display: block;
+    color: #FFF;
+    padding: 16px;
+    text-decoration: none;
+  }
+   
+  .nav a.active {
+    background-color: #4CAF50;
+    color: white;
+  }
+  
+  .nav a:hover:not(.active) {
+    background-color: #555;
+    color: white;
+  }
+  
+main {
+    margin-left: 200px;
+    padding: 1px 16px;
+    height: 1000px;
+  }
+  
+  @media screen and (max-width: 700px) {
+    .nav {
+      width: 100%;
+      height: auto;
+      position: relative;
+    }
+    .nav a {float: left;}
+    main {margin-left: 0;}
+  }
+  
+  @media screen and (max-width: 400px) {
+    .sidebar a {
+      text-align: center;
+      float: none;
+    }
+  }
+
+  .container {
+      margin-bottom: 40px;
+  }
+
+.song {
+    background: #F84828;
+    color: white;
+    padding: 10px;
+    font-size: 14pt;
+    margin: 10px 0;
+}
+
+.song p {
+    margin: 0;
+}
+
+.song-link {
+    text-decoration: none;
+}
+
+.song-form {
+    background: #ff5333;
+    color: #FFF;
+    padding: 20px;
+}
+
+.form-field {
+    background: #555555;
+    padding: 15px 20px 20px 20px;
+    margin-bottom: 20px;
+}
+
+.form-field p {
+    margin: 0;
+    font-size: 18pt;
+}
+
+ .form-field > label {
+    display: block;
+}
+
+.form-field input {
+    margin: 5px 0;
+}
+
+.form-field input[type="text"] {
+    width: 300px;
+}
+
+.form-field input[type="number"] {
+    width: 50px;
+}
+
+h1 small {
+    color: #4a4a4a;
+}
+
+.form-field-indent {
+    margin-left: 20px;
+}
+
+.checkbox {
+    display: inline-block;
+}
+
+.checkbox input {
+    margin-right: 3px;
+    margin-left: 5px;
+}
\ No newline at end of file
diff --git a/schema.py b/schema.py
new file mode 100644
index 0000000..1ba0c81
--- /dev/null
+++ b/schema.py
@@ -0,0 +1,73 @@
+import jsonschema
+
+def validate(data, schema):
+    try:
+        jsonschema.validate(data, schema)
+        return True
+    except jsonschema.exceptions.ValidationError:
+        return False
+
+register = {
+    '$schema': 'http://json-schema.org/schema#',
+    'type': 'object',
+    'properties': {
+        'username': {'type': 'string'},
+        'password': {'type': 'string'}
+    }
+}
+
+login = {
+    '$schema': 'http://json-schema.org/schema#',
+    'type': 'object',
+    'properties': {
+        'username': {'type': 'string'},
+        'password': {'type': 'string'},
+        'remember': {'type': 'boolean'}
+    }
+}
+
+update_display_name = {
+    '$schema': 'http://json-schema.org/schema#',
+    'type': 'object',
+    'properties': {
+        'display_name': {'type': 'string'}
+    }
+}
+
+update_password = {
+    '$schema': 'http://json-schema.org/schema#',
+    'type': 'object',
+    'properties': {
+        'current_password': {'type': 'string'},
+        'new_password': {'type': 'string'}
+    }
+}
+
+delete_account = {
+    '$schema': 'http://json-schema.org/schema#',
+    'type': 'object',
+    'properties': {
+        'password': {'type': 'string'}
+    }
+}
+
+scores_save = {
+    '$schema': 'http://json-schema.org/schema#',
+    'type': 'object',
+    'properties': {
+        'scores': {
+            'type': 'array',
+            'items': {'$ref': '#/definitions/score'}
+        },
+        'is_import': {'type': 'boolean'}
+    },
+    'definitions': {
+        'score': {
+            'type': 'object',
+            'properties': {
+                'hash': {'type': 'string'},
+                'score': {'type': 'string'}
+            }
+        }
+    }
+}
diff --git a/templates/admin.html b/templates/admin.html
new file mode 100644
index 0000000..e92ff9a
--- /dev/null
+++ b/templates/admin.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8">
+        <title>Taiko Web Admin</title>
+
+        <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;700&display=swap" rel="stylesheet">
+        <link href="/src/css/admin.css" rel="stylesheet">
+    </head>
+    <body>
+        <header>
+            <div class="nav">
+                <a href="/admin/songs">Songs</a>
+            </div>
+        </header>
+
+        <main>
+            <div class="container">
+                {% block content %}{% endblock %}
+            </div>
+        </main>
+    </body>
+</html>
diff --git a/templates/admin_song_detail.html b/templates/admin_song_detail.html
new file mode 100644
index 0000000..322c835
--- /dev/null
+++ b/templates/admin_song_detail.html
@@ -0,0 +1,87 @@
+{% extends 'admin.html' %}
+{% block content %}
+<h1>{{ song.title }} <small>(ID: {{ song.id }})</small></h1>
+<div class="song-form">
+    <form method="post">
+
+        <div class="form-field">
+            <span class="checkbox"><input type="checkbox" name="enabled" id="enabled"{% if song.enabled %} checked{% endif %}><label for="enabled"> Enabled</label></span>
+        </div>
+
+        <div class="form-field">
+            <p>Title</p>
+            <label for="title">Original</label>
+            <input type="text" id="title" value="{{song.title}}" name="title">
+            <label for="title_ja">Japanese</label>
+            <input type="text" id="title_ja" value="{{song.title_lang.ja}}" name="title_ja">
+            <label for="title_en">English</label>
+            <input type="text" id="title_en" value="{{song.title_lang.en}}" name="title_en">
+            <label for="title_cn">Chinese (Simplified)</label>
+            <input type="text" id="title_cn" value="{{song.title_lang.cn}}" name="title_cn">
+            <label for="title_tw">Chinese (Traditional)</label>
+            <input type="text" id="title_tw" value="{{song.title_lang.tw}}" name="title_tw">
+            <label for="title_ko">Korean</label>
+            <input type="text" id="title_ko" value="{{song.title_lang.ko}}" name="title_ko">
+        </div>
+
+        <div class="form-field">
+            <p>Subtitle</p>
+            <label for="subtitle">Original</label>
+            <input type="text" id="subtitle" value="{{song.subtitle}}" name="subtitle">
+            <label for="subtitle_ja">Japanese</label>
+            <input type="text" id="subtitle_ja" value="{{song.subtitle_lang.ja}}" name="subtitle_ja">
+            <label for="subtitle_en">English</label>
+            <input type="text" id="subtitle_en" value="{{song.subtitle_lang.en}}" name="subtitle_en">
+            <label for="subtitle_cn">Chinese (Simplified)</label>
+            <input type="text" id="subtitle_cn" value="{{song.subtitle_lang.cn}}" name="subtitle_cn">
+            <label for="subtitle_tw">Chinese (Traditional)</label>
+            <input type="text" id="subtitle_tw" value="{{song.subtitle_lang.tw}}" name="subtitle_tw">
+            <label for="subtitle_ko">Korean</label>
+            <input type="text" id="subtitle_ko" value="{{song.subtitle_lang.ko}}" name="subtitle_ko">
+        </div>
+
+        <div class="form-field">
+            <p>Courses</p>
+            <label for="course_easy">Easy</label>
+            <input type="number" id="course_easy" value="{{song.courses.easy.stars}}" name="course_easy" min="1" max="10">
+            <span class="checkbox"><input type="checkbox" name="branch_easy" id="branch_easy"{% if song.courses.easy.branch %} checked{% endif %}><label for="branch_easy"> Diverge Notes</label></span>
+            <label for="course_normal">Normal</label>
+            <input type="number" id="course_normal" value="{{song.courses.normal.stars}}" name="course_normal" min="1" max="10">
+            <span class="checkbox"><input type="checkbox" name="branch_normal" id="branch_normal"{% if song.courses.normal.branch %} checked{% endif %}><label for="branch_normal"> Diverge Notes</label></span>
+            <label for="course_hard">Hard</label>
+            <input type="number" id="course_hard" value="{{song.courses.hard.stars}}" name="course_hard" min="1" max="10">
+            <span class="checkbox"><input type="checkbox" name="branch_hard" id="branch_hard"{% if song.courses.hard.branch %} checked{% endif %}><label for="branch_hard"> Diverge Notes</label></span>
+            <label for="course_oni">Oni</label>
+            <input type="number" id="course_oni" value="{{song.courses.oni.stars}}" name="course_oni" min="1" max="10">
+            <span class="checkbox"><input type="checkbox" name="branch_oni" id="branch_oni"{% if song.courses.oni.branch %} checked{% endif %}><label for="branch_oni"> Diverge Notes</label></span>
+            <label for="course_ura">Ura</label>
+            <input type="number" id="course_ura" value="{{song.courses.ura.stars}}" name="course_ura" min="1" max="10">
+            <span class="checkbox"><input type="checkbox" name="branch_ura" id="branch_ura"{% if song.courses.ura.branch %} checked{% endif %}><label for="branch_ura"> Diverge Notes</label></span>
+        </div>
+
+        <div class="form-field">
+            <p><label for="category_id">Category</label></p>
+            <select name="category_id" id="category_id">
+                {% for category in categories %}
+                    <option value="{{ category.id }}"{% if song.category_id == category.id %} selected{% endif %}>{{ category.title }}</option>
+                {% endfor %}
+            </select>
+        </div>
+
+        <div class="form-field">
+            <p><label for="type">Type</label></p>
+            <select name="type" id="type">
+                <option value="tja"{% if song.type == 'tja' %} selected{% endif %}>TJA</option>
+                <option value="osu"{% if song.type == 'osu' %} selected{% endif %}>osu!taiko</option>
+            </select>
+        </div>
+
+        <div class="form-field">
+            <p><label for="offset">Offset</label></p>
+            <input type="text" id="offset" value="{{song.offset}}" name="offset">
+        </div>
+
+        <button type="submit">Save</button>
+    </form>
+</div>
+{% endblock %}
diff --git a/templates/admin_songs.html b/templates/admin_songs.html
new file mode 100644
index 0000000..eb55425
--- /dev/null
+++ b/templates/admin_songs.html
@@ -0,0 +1,11 @@
+{% extends 'admin.html' %}
+{% block content %}
+<h1>Songs</h1>
+{% for song in songs %}
+    <a href="/admin/songs/{{ song.id }}" class="song-link">
+        <div class="song">
+            <p>{{ song.title }}</p>
+        </div>
+    </a>
+{% endfor %}
+{% endblock %}
diff --git a/tools/migrate_db.py b/tools/migrate_db.py
new file mode 100644
index 0000000..7ae71c6
--- /dev/null
+++ b/tools/migrate_db.py
@@ -0,0 +1,105 @@
+#!/usr/bin/env python3
+# Migrate old SQLite taiko.db to MongoDB
+
+import sqlite3
+from pymongo import MongoClient
+
+client = MongoClient()
+#client.drop_database('taiko')
+db = client.taiko
+sqdb = sqlite3.connect('taiko.db')
+sqdb.row_factory = sqlite3.Row
+curs = sqdb.cursor()
+
+def migrate_songs():
+    curs.execute('select * from songs')
+    rows = curs.fetchall()
+
+    for row in rows:
+        song = {
+            'id': row['id'],
+            'title': row['title'],
+            'title_lang': {'ja': row['title']},
+            'subtitle': row['subtitle'],
+            'subtitle_lang': {'ja': row['subtitle']},
+            'courses': {'easy': None, 'normal': None, 'hard': None, 'oni': None, 'ura': None},
+            'enabled': True if row['enabled'] else False,
+            'category_id': row['category'],
+            'type': row['type'],
+            'offset': row['offset'],
+            'skin_id': row['skin_id'],
+            'preview': row['preview'],
+            'volume':  row['volume'],
+            'maker_id': row['maker_id'],
+            'hash': row['hash'],
+            'order': row['id']
+        }
+
+        for diff in ['easy', 'normal', 'hard', 'oni', 'ura']:
+            if row[diff]:
+                spl = row[diff].split(' ')
+                branch = False
+                if len(spl) > 1 and spl[1] == 'B':
+                    branch = True
+                
+                song['courses'][diff] = {'stars': int(spl[0]), 'branch': branch}
+        
+        if row['title_lang']:
+            langs = row['title_lang'].splitlines()
+            for lang in langs:
+                spl = lang.split(' ', 1)
+                if spl[0] in ['ja', 'en', 'cn', 'tw', 'ko']:
+                    song['title_lang'][spl[0]] = spl[1]
+                else:
+                    song['title_lang']['en'] = lang
+
+        if row['subtitle_lang']:
+            langs = row['subtitle_lang'].splitlines()
+            for lang in langs:
+                spl = lang.split(' ', 1)
+                if spl[0] in ['ja', 'en', 'cn', 'tw', 'ko']:
+                    song['subtitle_lang'][spl[0]] = spl[1]
+                else:
+                    song['subtitle_lang']['en'] = lang
+
+        db.songs.insert_one(song)
+
+def migrate_makers():
+    curs.execute('select * from makers')
+    rows = curs.fetchall()
+
+    for row in rows:
+        db.makers.insert_one({
+            'id': row['maker_id'],
+            'name': row['name'],
+            'url': row['url']
+        })
+
+def migrate_categories():
+    curs.execute('select * from categories')
+    rows = curs.fetchall()
+
+    for row in rows:
+        db.categories.insert_one({
+            'id': row['id'],
+            'title': row['title']
+        })
+
+def migrate_song_skins():
+    curs.execute('select * from song_skins')
+    rows = curs.fetchall()
+
+    for row in rows:
+        db.song_skins.insert_one({
+            'id': row['id'],
+            'name': row['name'],
+            'song': row['song'],
+            'stage': row['stage'],
+            'don': row['don']
+        })
+
+if __name__ == '__main__':
+    migrate_songs()
+    migrate_makers()
+    migrate_categories()
+    migrate_song_skins()