A biwa used for this purpose is called 'Heike biwa', which has the same structure as Gakubiwa (lute for Gagaku (ancient Japanese court dance and music) performance), and the small-sized one is often used.
これに使われる琵琶を平家琵琶と呼び、構造は楽琵琶と同じで、小型のものが多く用いられる。