This painting (primarily black, white, and gray) on a canvas, depicting the head and shoulders of a Sumo Wrestler
The figure appears to be a Sumo wrestler (or rikishi), recognizable by the traditional hairstyle, known as a chonmage or topknot, which is worn by sumo wrestlers.
the painting is done in a realistic or semi-realistic style, focusing on strong contrast and shading to define the features, often referred to as grisaille when done exclusively in shades of gray.
The use of light and shadow is effective in giving the face depth and volume.
Color Palette: It is almost entirely black and white (grayscale), which gives it a dramatic and intense feel.
Medium: It looks like it could be an acrylic or oil painting due to the texture and coverage on the canvas.