Koi koi grown in Japan is said to live longer than Koi koi grown outside Japan.
Koi live in Japan for an average of 40 years, outside Japan for 15 years. Among them, Hanako, the carp, has set a historical record of 220 years.
What is the difference between these lifetimes? Some factors affecting the life expectancy are as follows.
First, unlike in Japan, the carp breeders of foreign countries are fed more than necessary to grow quickly, leading to obesity and premature death.
Second, Japanese Koi carp spends more time in winter than carp in other countries. Japanese breeders do not warm the pond to keep the carp from hibernating.
On the other hand, foreign breeders do not hibernate by warming the pond until summer temperature. In other words, 'Winter' greatly increases the life span of Koi carp.
To summarize, the life span of Koi carp depends on how well you care. Proper feeding and clean ponds are a way to extend the life of Koi carp regardless of where the carp comes from.