This is the "Musubi no Ito" (Binding Thread) from Homan-gu Kamado Shrine, also famous as a sacred site for Demon Slayer. Long ago, it is said that Empress Jingu prayed for reunion at the Saikai (Reunion) Tree. It is believed that if you pray for reunion with someone you like or for a good relationship at this tree, your wish will come true. The "Reunion Fruit" of the "Koi Mamori Musubi no Ito" (Love Charm Binding Thread) is created in the image of the beans that grow on this tree, and is imbued with the divine spirit of Homan-gu Kamado Shrine.