Yamada is a fixture among the colorful regulars at a beloved bar in Sapporo's North 24th neighborhood, located five stations from the Susukino district. He frequents the establishment alongside the proprietor, junior proprietor, and fellow eccentric patrons. His character unfolds entirely within the bar's walls through witty exchanges and comedic tales drawn from his daily life, shared with regulars like Tatsu-nii, Morita, and Kazama. These interactions form the heart of his portrayal, showcasing his eccentric personality through humorous observations and shared anecdotes. As an essential ingredient in the bar's unique social atmosphere, Yamada contributes directly to the series' focus on conversational humor and the dynamic tapestry of interactions among the diverse clientele. He functions purely as part of this ensemble cast, defined by his quirks and active participation in the bar's communal life.