Several Koi swimming in a stream of the Shōkadō Garden, Yawata City-Kyoto Prefecture. Did you know?: The words “koi” and “Nishikigoi” come from the Japanese words 鯉 (carp) and 錦鯉 (brocaded carp), respectively. In Japanese, “koi” is a homophone for 恋, another word that means “affection” or “love”, so koi are symbols of love and friendship in Japan.