Is Ghost of Tsushima a souls game?

Ghost of Tsushima is not a Souls game, not even a Souls-like. To be a Souls game, a title has to be created by FromSoftware, and within the influence of Hidetaka Miyazaki.

The game does not have to be directed by Miyazaki himself, like in the case of Dark Souls II, which is still considered a Souls game, though directed by Yui Tanimura. He just had to have an influence on the game.

Ghost of Tsushima is not a Souls-like because it does not have its characteristics.