To commemorate the release of *The Shore of the Underworld*, the first new volume in Fuyumi Ono’s fantasy series *The Twelve Kingdoms* in seven years, a *The Twelve Kingdoms* pop-up store will be held at venues operated by the Maruzen Junkudo Bookstore Group starting September 17, 2026. Exclusive Maruzen Junku Bookstore merchandise—including printed cookies, large handkerchiefs, Jetstream Lite pens, and original shopping bags—will be available. Sales of the new book and merchandise will begin at midnight on September 17 at magmabooks in Toranomon, Tokyo.