Tío Jam, also called Jamu Ojisan in Japanese, serves as Anpanman’s creator and devoted guardian, merging artisanal baking skill with celestial chance to spark the hero’s existence. A master baker dwelling in a woodland bakery, he formed Anpanman’s iconic anpan head by blending dough with a radiant "star of life" that crashed into his oven mid-meteor shower. This cosmic event birthed Anpanman and cemented Tío Jam’s dual role as a nurturing father-figure and guiding mentor.

Renowned for culinary mastery and vast, versatile knowledge, he aids Anpanman and allies in overcoming challenges, strategizing solutions with calm expertise. His enduring duty involves baking fresh anpan heads to replace those damaged or sacrificed to feed the hungry, each revival renewing Anpanman’s vigor for battling injustice.

Gentle and sagacious, Tío Jam partners with Batako, his steadfast assistant, in rearing Anpanman and repairing hero capes—a teamwork forged by shared commitment to the hero’s cause. Beyond Anpanman, his inventive ambition once birthed Rollpanna, though her final form diverged from his initial vision due to external tampering.

A constant linchpin across the series, Tío Jam anchors its ethos of creativity and altruism. His origins remain rooted solely in Anpanman’s creation, his past unchronicled in spin-offs, while his ageless presence—untethered to calendars or birthdays—echoes the narrative’s timeless emphasis on ceaseless guardianship and communal compassion.