A yokai visual novel is a form of media that combines the concept of yokai from Japanese culture with the visual novel format. Visual novels are known for their narrative - driven nature. In the case of a yokai visual novel, it might feature different types of yokai such as kitsune (fox spirits), oni (demons), or tanuki (raccoon dogs). These yokai could be the main characters or play important roles in the plot. The stories could range from spooky and mysterious, to heart - warming or comical, all while exploring the unique aspects of yokai mythology within the framework of a visual novel.
I'm not sure about all the popular ones, but some might exist. There could be niche - market titles that are well - known among fans of yokai and visual novels.
Well, 'will visual novel' could be a new or relatively unknown visual novel. Visual novels generally rely on strong narratives and character development. Maybe 'will' here refers to a character's will or the overarching theme of the will to achieve something in the plot. Without more context, it's hard to say exactly, but it's probably an interesting exploration of a story through text and visuals.