Matsuzō Matsuno serves as the father of the Matsuno sextuplets. He possesses a short, plump stature, a large nose, prominent buckteeth, and a distinctive curly mustache. His appearance features closely-shaved hair on the sides, and he typically wears suits or casual long-sleeved tops with pants. Later manga serializations depict him as shorter and squatter in design.

Working as a salaryman, Matsuzō adopted this career to better support his family after relinquishing ownership of the liquor shop "Mimatsuya" before his sons' birth. Media adaptations present conflicting origins for the family home—whether converted from the shop—with later depictions showing no storefront elements.

His personality blends strictness with helplessness. He frequently attempts to discipline his rowdy sons but fails due to their antics and his own inefficacies. Financial instability plagues the household, exacerbated by Matsuzō's recurring habit of dropping or losing his work checks, leading to hunger or forcing the children to seek work. Despite these struggles, he occasionally displays a laid-back side, such as dismissing his son Osomatsu’s demands only to face reprimands from his wife Matsuyo.

Matsuzō endures stress from his job—where superiors pressure him—and chaotic family life. He is a known fan of the Chunichi Dragons baseball team. Relationships with his sons highlight his ineffectual authority; they often overrule or ignore him. His marriage involves shared frustrations, with Matsuyo occasionally joining in scolding him during disputes.

Inconsistencies exist regarding his name, including its adaptation as "Matsutarō" in a live-action drama due to the original name "Matsuzō" appearing only once in the manga chapter "French Etiquette". The film *Osomatsu-kun: Suika no Hoshi kara Konnichiwa zansu!* offers no documented unique background details or significant character development for Matsuzō across available sources.