According to the official rules published by miHoYo, the Genshin Impact Cat Day photo contest is open to all players worldwide, but you won’t get any physical prizes if you don’t live in Japan as there will be no international shipping.
Genshin Impact developer miHoYo is holding a special Cat Day photo contest on Twitter this February 22, 2022.
The winners of the Genshin Cat Day contest will be announced on March 1.
Cat Day is only celebrated in Japan, so a US-based version of the contest wasn’t announced as of now.