The Japanese term “koi” refers to multicolored carp, also known as “swimming flowers.” Considered living jewels and symbols of perseverance and virtue, they are raised in ornamental ponds and revered as bringers of luck and success. The players are koi breeders competing to expand their own ponds.

The winner is whoever creates the best environment for their koi.

This game is freely inspired by various Asian cultures, in particular Japanese and Chinese ones, without any claim of historical accuracy.