Therefore, Shinei MATAYOSHI, who was an expert of manufacturing Sanshin and was also famous as a Kucho player, developed four-stringed Kucho provided with a string for bass part additionally and made the instrument used widely (with three-stringed Kucho, the scores of these lower tones were played raised by an octave).
そこで、三線の名工で胡弓演奏家としても著名であった又吉真栄が低音用の弦を新たに設けた四弦胡弓を開発し、普及させた（三弦胡弓では１オクターブ上の音を弾いて代用していた）。