Additionally, there is a poetry exchanged between man and woman with an unknown person called Kume no Zenji, described from the era of Emperor Tenchi, which means they were written before the relationships with Prince Otsu and Prince Kusakabe.
また、久米禅師という不詳の人物との贈答歌が残されているが、これらの歌々は万葉集では天智天皇の時代のものとなっており、大津皇子や草壁皇子とかかわる前の作である。