Koi is called Nishikigoi in Japan.

Koi carp is called Nishikigoi in Japan and is called "living gemstone in water". According to the information of the Koi Township Museum in Xiaoqianggu, Niigata Prefecture, Japan, during the Edo Period (1804-1829), people in Xiaoqianggu City, Yamaguchi Village and Changgang City in the central part of Niigata Prefecture found carp with abrupt body color in the pond for the purpose of enriching its color. Later, breeders made unremitting efforts to enrich its color. Efforts culminated in the breeding of light yellow, Pingguang and red carp.
In the sixth year of Dazheng (1917), Guangjing National Collection bred the real and most primitive red and white brocade carp; in the year of Dazheng (after 1910), white, yellow and Dazheng varieties were bred; in the year of Zhaohe (after 1926), Zhao and three colors, gold and silver scales, gold and other varieties appeared.
The Japanese have designated Valley Zhicun as the birthplace of Koi carp, and called the areas of Xiaoqiangu City, Guzhi Village, Changgang City and Yumar City in the central part of Xinxie County as "the hometown of Koi carp".# Reading City# Nagaoka, Japan