     }
 
     func calcurateKusaRate() -> Double {
-        if chats.isEmpty || chats.count < 3 {
+        if chats.isEmpty || chats.count < 5 {
             return 0
         }
         let kusaChats = chats.filter { isKusaComment($0.comment) }

    }

    func add(chat: Chat) {
        objc_sync_enter(self)
        defer { objc_sync_exit(self) }
        chats.append(chat)


    // swiftlint:disable force_try
    private let kusaRegexp = try! NSRegularExpression(pattern: "^(w|W|ｗ|Ｗ){1,}$", options: [])
    private let waraRegexp = try! NSRegularExpression(pattern: "^.+(w|W|ｗ|Ｗ){1,}$", options: [])
    private let aRegexp = try! NSRegularExpression(pattern: "^あ$", options: [])
    private let eRegexp = try! NSRegularExpression(pattern: "^え$", options: [])
    private let noRegexp = try! NSRegularExpression(pattern: "^ノ$", options: [])
    // swiftlint:enable force_try
}
