The image shows a limited-edition Goshuin (temple stamp) sold at Kakegawa Castle. This special Goshuin is only sold on "Ichiryū Manbaibi" days, considered auspicious days. Details: Castle Name: Kakegawa Castle (Kakegawa City, Shizuoka Prefecture) Features: Unique design in the shape of rice grains. Features a gold foil dragon design, inspired by Ryūzanzan (Dragon Head Mountain), where Kakegawa Castle is located. "Ichiryū Manbaibi" is a lucky day meaning "one grain of rice yields ten thousand," and is considered the best day to start something new.