A nightmarish depiction of a sinister Japanese Oni with a highly detailed and hyperrealistic appearance. The portrait view captures the intricacy of the features in 8k resolution, focusing on the dramatic expression under side lighting. The composition highlights a 2/3 face angle against a colorful and intense background. Despite the meticulous detail, the figure is intentionally flawed with distorted anatomy and poorly rendered hands and feet. The face exhibits mismatched eyes and a crooked expression, adding to its unsettling presence. Elements such as extra limbs and disfigured features enhance the eerie atmosphere. The image is deliberately off-center with grainy textures, creating a sense of disorientation and emphasizing the nightmarish quality of the Oni.