Yamazaki Koi Farm ( Yamasan Yorijo) – is run by Manabu Yamazaki in the Kawaguchi region. Established in 1973 it is one of the largest koi farms in Japan covering almost 10 acres with 50 ponds. They are one of the few breeders producing butterfly koi and produce a large number of koi varieties such as Kohaku, Showa, Sanke,Goshiki, Yamabuki, Doitsu Yamamato, Hi Utsuri, Ochiba, Kinki Utsuri, Platina, Benikikokuryu, Doitsu Sanke, Chagoi, Benigoi, Karashigoi
