In the 'Enkyo bon' and 'Kamakura bon' (both of which are different versions of Heike Monogatari [The tale of the Heike]), there is a scene where Naozane was sending the flute of Atsumori to his father, TAIRA no Tsunemori, who lived in Yashima Island, and letters from Naozane to Tsunemori and vice versa were also exchanged.
「延慶本」や「鎌倉本」では、直実が敦盛の笛（または篳篥）を屋島にいる敦盛の父平経盛の元に送り、直実の書状と経盛の返状が交わされる場面が描かれている。