This is a novelty item in the style of a goshuin (temple stamp) officially created by Nagomi Town as a commemorative item for visiting the cultural assets and tourist spots scattered throughout the town. It's a set of four: a castle stamp, the Eda Funayama Kofun stamp (featured in history textbooks), the birthplace of Shiso Kanakuri, who was also the main character of a historical drama, and the goshuin of Kamado Sugawara Shrine. Kamado Sugawara Shrine was featured on television as a sacred place for Tanjiro Kamado, the protagonist of Demon Slayer. Also, because Sugawara no Michizane is enshrined there, it is also a god of learning. It is a shrine that is relevant not only to Demon Slayer but also as a god of learning. I visited these a few years ago and have kept them in sleeves. I don't know if they are still available now. Thank you! ☺︎