The title of the film is Natsume Yujin-cho: Ishi Okoshi to Ayashiki Raihousha (Natsume Yujin-cho: The Waking Rock and the Strange Visitor).
It has been two years since the previous film Natsume Yujin-Cho: Utsusemi ni Musubu (Natsume Yujin-cho the Movie: Ephemeral Bond) was released in Japan in September 2018.
In the special live-streaming program on Nico Nico Live last night, it was officially announced that a new anime film based on Yuki Midorikawa’s supernatural mystery shoujo manga Natsume Yujin-cho plans its limited theatrical run in Japan in early spring of 2021.