Collaboration items between the TV anime “Natsume’s Book of Friends” and Chambre will go on sale starting September 12, 2026, at Chambre stores nationwide and on the official Chambre online store. The lineup includes a total of seven items, ranging from mascot charms and zipper pulls featuring Nyanko-sensei to 2-way bags, shoulder bags, notebook pouches, and scrunchies, with prices starting at 759 yen (tax included).