The Ojiya no Sato Museum in Niigata Prefecture, Japan, is the sole museum on earth that reveals the two kinds of residing koi and data that show the history of their breeding.[2] In line with Zen Nippon Airinkai, a group that leads the breeding and dissemination of koi in Japan, https://www.propanraya.com/cara-merawat-ikan-koi-agar-tetap-sehat-dan-indah-di-kolam-rumah