Futoshi Kosugi is a male third-grade student from the anime Chibi Maruko-chan, who lives in the same neighborhood as a character named Ohno-kun. He is easily recognized by his portly build, a physical characteristic directly tied to his most defining trait: an insatiable appetite. Known as a notorious glutton, his entire personality and motivations are centered almost exclusively around food.

His behavior becomes notably self-centered and brazen whenever food is involved, as his desire to eat remains completely unchecked. Lunchtime is his favorite part of the school day, and he has a remarkable, almost supernatural ability to materialize instantly at any location the moment food is mentioned, regardless of where he was before. He has no food dislikes and maintains a zero-tolerance policy for any lies or deception concerning food.

In the story, his role is primarily defined by his comedic and single-minded pursuit of eating. Key relationships are not extensively detailed, but it is established that he is a neighbor of Ohno-kun. Information regarding significant character development over time is not available. His notable abilities include his instantaneous appearance when food is discussed, his lack of any dietary aversions, and his firm intolerance for dishonesty related to meals.