diff --git a/README.md b/README.md
index f0c091b..77f3802 100644
--- a/README.md
+++ b/README.md
@@ -94,3 +94,30 @@ docker run --detach \
 ---
 
 如需将监听接口改为仅内网或增加并发工作数（例如 `--workers 4`），可在 `setup.sh` 或 `systemd` 服务中调整。
+## 歌曲类型（Type）
+
+- 可选枚举：
+  - 01 Pop
+  - 02 Anime
+  - 03 Vocaloid
+  - 04 Children and Folk
+  - 05 Variety
+  - 06 Classical
+  - 07 Game Music
+  - 08 Live Festival Mode
+  - 09 Namco Original
+  - 10 Taiko Towers
+  - 11 Dan Dojo
+
+### 上传要求
+- 上传表单新增必填字段 `song_type`，取值为上述枚举之一
+- 成功后将写入 MongoDB `songs.song_type`
+
+### API 扩展
+- `GET /api/songs?type=<歌曲类型>` 按类型过滤返回启用歌曲
+- 示例：`/api/songs?type=02%20Anime`
+- 返回项包含 `song_type` 字段
+
+### 前端切换
+- 在歌曲选择页顶部显示当前歌曲类型标签
+- 使用左右跳转（Shift+左右或肩键）自动切换类型并刷新列表
diff --git a/app.py b/app.py
index 0b6203a..4b12cde 100644
--- a/app.py
+++ b/app.py
@@ -45,6 +45,19 @@ def take_config(name, required=False):
         return None
 
 app = Flask(__name__)
+SONG_TYPES = [
+    "01 Pop",
+    "02 Anime",
+    "03 Vocaloid",
+    "04 Children and Folk",
+    "05 Variety",
+    "06 Classical",
+    "07 Game Music",
+    "08 Live Festival Mode",
+    "09 Namco Original",
+    "10 Taiko Towers",
+    "11 Dan Dojo",
+]
 
 def get_remote_address() -> str:
     return flask.request.headers.get("CF-Connecting-IP") or flask.request.headers.get("X-Forwarded-For") or flask.request.remote_addr or "127.0.0.1"
@@ -90,6 +103,7 @@ sess.init_app(app)
 db = client[take_config('MONGO', required=True)['database']]
 db.users.create_index('username', unique=True)
 db.songs.create_index('id', unique=True)
+db.songs.create_index('song_type')
 db.scores.create_index('username')
 
 
@@ -480,7 +494,13 @@ def route_api_preview():
 @app.route(basedir + 'api/songs')
 @app.cache.cached(timeout=15)
 def route_api_songs():
-    songs = list(db.songs.find({'enabled': True}, {'_id': False, 'enabled': False}))
+    type_q = flask.request.args.get('type')
+    query = {'enabled': True}
+    if type_q:
+        if type_q not in SONG_TYPES:
+            return abort(400)
+        query['song_type'] = type_q
+    songs = list(db.songs.find(query, {'_id': False, 'enabled': False}))
     for song in songs:
         if song['maker_id']:
             if song['maker_id'] == 0:
@@ -853,6 +873,12 @@ def upload_file():
         db_entry['enabled'] = True
         pprint.pprint(db_entry)
 
+        # 必要な歌曲类型
+        song_type = flask.request.form.get('song_type')
+        if not song_type or song_type not in SONG_TYPES:
+            return flask.jsonify({'error': 'invalid_song_type'})
+        db_entry['song_type'] = song_type
+
         # mongoDBにデータをぶち込む（重複IDは部分更新で上書きし、_id を不変に保つ）
         coll = client['taiko']["songs"]
         try:
diff --git a/public/src/js/songselect.js b/public/src/js/songselect.js
index 58ba125..343645b 100644
--- a/public/src/js/songselect.js
+++ b/public/src/js/songselect.js
@@ -386,6 +386,32 @@ class SongSelect{
 		}
 		
 		this.songSelect = document.getElementById("song-select")
+		this.songTypes = [
+			"01 Pop",
+			"02 Anime",
+			"03 Vocaloid",
+			"04 Children and Folk",
+			"05 Variety",
+			"06 Classical",
+			"07 Game Music",
+			"08 Live Festival Mode",
+			"09 Namco Original",
+			"10 Taiko Towers",
+			"11 Dan Dojo",
+		]
+		this.songTypeIndex = Math.max(0, Math.min(this.songTypes.length - 1, +(localStorage.getItem("songTypeIndex") || 0)))
+		this.typeLabel = document.createElement("div")
+		this.typeLabel.style.position = "absolute"
+		this.typeLabel.style.top = "8px"
+		this.typeLabel.style.left = "12px"
+		this.typeLabel.style.padding = "4px 8px"
+		this.typeLabel.style.background = "rgba(0,0,0,0.5)"
+		this.typeLabel.style.color = "#fff"
+		this.typeLabel.style.borderRadius = "6px"
+		this.typeLabel.style.fontSize = "14px"
+		this.typeLabel.style.zIndex = "10"
+		this.songSelect.appendChild(this.typeLabel)
+		this.updateTypeLabel()
 		var cat = this.songs[this.selectedSong].originalCategory
 		this.drawBackground(cat)
 		
@@ -536,24 +562,20 @@ class SongSelect{
 				this.toSession()
 			}else if(name === "left"){
 				if(shift){
-					if(!repeat){
-						this.categoryJump(-1)
-					}
+					if(!repeat){ this.changeType(-1) }
 				}else{
 					this.moveToSong(-1)
 				}
 			}else if(name === "right"){
 				if(shift){
-					if(!repeat){
-						this.categoryJump(1)
-					}
+					if(!repeat){ this.changeType(1) }
 				}else{
 					this.moveToSong(1)
 				}
 			}else if(name === "jump_left" && !repeat){
-				this.categoryJump(-1)
+				this.changeType(-1)
 			}else if(name === "jump_right" && !repeat){
-				this.categoryJump(1)
+				this.changeType(1)
 			}else if(name === "mute" || name === "ctrlGamepad"){
 				this.endPreview(true)
 				this.playBgm(false)
@@ -597,6 +619,23 @@ class SongSelect{
 			}
 		}
 	}
+
+	updateTypeLabel(){
+		this.setAltText(this.typeLabel, this.songTypes[this.songTypeIndex])
+	}
+
+	changeType(delta){
+		this.songTypeIndex = (this.songTypeIndex + delta + this.songTypes.length) % this.songTypes.length
+		localStorage.setItem("songTypeIndex", this.songTypeIndex)
+		this.updateTypeLabel()
+		var type = encodeURIComponent(this.songTypes[this.songTypeIndex])
+		loader.ajax("api/songs?type=" + type).then(resp => {
+			var songs = JSON.parse(resp)
+			assets.songsDefault = songs
+			assets.songs = assets.songsDefault
+			new SongSelect(false, false, this.touchEnabled)
+		}).catch(() => {})
+	}
 	
 	mouseDown(event){
 		if(event.target === this.selectable || event.target.parentNode === this.selectable){
diff --git a/public/upload/index.html b/public/upload/index.html
index 6c43997..b940417 100644
--- a/public/upload/index.html
+++ b/public/upload/index.html
@@ -16,6 +16,21 @@
 
       <label for="file_music">音楽ファイル:</label>
       <input type="file" name="file_music" accept=".ogg,.mp3,.wav" required>
+
+      <label for="song_type">曲のタイプ:</label>
+      <select name="song_type" required>
+        <option value="01 Pop">01 Pop</option>
+        <option value="02 Anime">02 Anime</option>
+        <option value="03 Vocaloid">03 Vocaloid</option>
+        <option value="04 Children and Folk">04 Children and Folk</option>
+        <option value="05 Variety">05 Variety</option>
+        <option value="06 Classical">06 Classical</option>
+        <option value="07 Game Music">07 Game Music</option>
+        <option value="08 Live Festival Mode">08 Live Festival Mode</option>
+        <option value="09 Namco Original">09 Namco Original</option>
+        <option value="10 Taiko Towers">10 Taiko Towers</option>
+        <option value="11 Dan Dojo">11 Dan Dojo</option>
+      </select>
     </form>
 
     <button type="button" onclick="uploadFiles()">今すぐ投稿！ (1分ほどかかる場合があります)</button>