After the final episode of Fruits Basket Season 3 (episode 13 final season) was aired in Japan, the official Twitter account for the series announced new upcoming projects, including a 2022 anime spin-off focusing on Kyoko and Katsuya.

Fruits Basket Kyoko and Katsuya anime spin-off announced

The new anime was announced at the end of Fruits Basket The Final, with a special "thanks movie" featuring messages and Shikishi from all of the main characters' seiyuu. A special illustration from Fruits Basket's mangaka Natsuki Takaya was shared as well. Natsuki Takaya was heavily involved in the remake anime's production, supervising the story.

A new Fruits Basket stage play (often misnamed "live action" projects by English fans) was also announced for 2022.

Lastly, note that no anime format was specified for the Kyoko and Katsuya adaptation, so it could be either a new TV series, or a movie. I'd personally bet on a movie.

Fruits Basket Kyoko and Katsuya - Is it canon?

Kyouko to Katsuya no Monogatari (The Story of Kyoko and Katsuya) is a spin-off and prequel focusing on Tohru's parents. In the anime remake, Kyoko is voiced by Miyuki Sawashiro, and Katsuya by Yoshimasa Hosoya. They will reprise their roles for this new anime.

The anime will be based on the flashback chapters found in Volume 16 of the Fruits Basket manga. So yeah it's canon.

It's interesting to see how Fruits Basket managed to get more popular than ever with its 2019-2021 anime remake, and perhaps even more projects will be announced after the Kyoko and Katsuya anime. Maybe we'll see Fruits Basket Another getting an anime too? I've personally always been a fan of the series since the first anime adaptation in 2001, so I'm definitely looking forward to seeing more.