The Ojiya No Sato Museum in Niigata Prefecture, Japan, is the only real museum on earth that exhibits both varieties of residing koi and details that present the background of their breeding.[2] According to Zen Nippon Airinkai, a group that potential customers the breeding and dissemination of koi in Japan, https://www.propanraya.com/cara-merawat-ikan-koi-agar-tetap-sehat-dan-indah-di-kolam-rumah