Made from haiku poems the ensemble refers to the airiness of Nobori flags in the wind. Whereas in the past they were markers on the battlefield, today they stand trellis next to religious temples or advertise the benefits of products outside shops. The poetry pages are over 150 years old and tell of people and their relationship with nature. Handwritten on the outside, the intertwined banners are lined with silk on the inside. The title Hikōkigumo refers to a song in the Ghibli manga The Wind Rises, which was recorded in 1973 and translates as Vapour Trail. In the lyrics, shadows were wrapped around a young girl as she died and ascended into the sky, becoming a contrail.