Jam Ojisan is the elderly baker operating from his bread factory in the Anpanman universe. His appearance echoes Anpanman but displays age through gray hair, a mustache, fluffy eyebrows, and lighter red cheeks and nose. He dresses in a white chef's hat, white shirt, pants, and apron, completing his outfit with blue-gray shoes. He accidentally brought Anpanman to life when a shooting star—called a "star of life" in some media—landed in his oven during the baking of an anpan, imbuing the bread with vitality. Beyond Anpanman, he is also the creator of Melonpanna and Rollpanna. Early media attributed Currypanman's creation to him, though this origin was later retconned as ambiguous. Profound kindness, warmth, and extensive knowledge gained during youthful travels define his personality. A large personal library reflects his broad understanding of the world. He is an expert baker and cook, adept at preparing diverse dishes, and a skilled inventor and mechanic who constructs mecha like the Anpanman Mobile and repairs robotic characters. He also rides motorcycles. He shares a deep father-son bond with Anpanman, having raised him from infancy and constantly encouraging his courage and compassion. He sustains Anpanman's strength by baking replacement heads when the original is damaged or depleted from sharing with the hungry. Acting as a father figure to Melonpanna and Creampanda, he supports Melonpanna and nurtures Creampanda's abilities as he once did with young Anpanman. Despite Rollpanna's dual hearts (red for good, blue for evil), he retains a soft spot for her as his creation, periodically inviting her to join the bakery community despite the risks posed by her evil heart. He maintains cooperative relationships with fellow bread heroes like Shokupanman and Currypanman, offering them assistance. He lives and works closely with Batako; though officially unrelated, they share a familial bond and mutual care rooted in a potentially lifelong connection. His pet dog, Cheese, is another companion, though their bond is less profound than with Batako. Within the lore, he and Batako are categorized as fairies, as humans do not exist in Anpanman's world. His character embodies themes of nurturing and resilience, indirectly reflecting creator Takashi Yanase's wartime experiences with starvation, where dreams of anpan symbolized sustenance and hope.