"Salaryman Yamasaki Shigeru" centers on the life of Shigeru Yamasaki, a middle-aged salaryman working at a Japanese trading company. The series portrays his daily struggles and humorous misadventures as he navigates the corporate world, balancing his professional responsibilities with his personal life. Shigeru is an ordinary, somewhat hapless employee who often finds himself in awkward or absurd situations, whether dealing with demanding bosses, eccentric coworkers, or the pressures of office politics. Despite his lack of charisma and occasional incompetence, Shigeru’s earnestness and resilience make him a relatable and endearing protagonist.

The narrative unfolds through episodic vignettes, each highlighting different aspects of Shigeru’s life. At work, he faces challenges such as meeting unrealistic deadlines, handling difficult clients, and enduring the whims of his superiors. His interactions with colleagues, including the ambitious and competitive Tanaka and the laid-back yet insightful Nakamura, add depth to the office dynamics. Outside of work, Shigeru’s personal life is equally chaotic, as he deals with his wife, who often questions his decisions, and his young son, who looks up to him despite his flaws. The series also explores Shigeru’s occasional attempts at self-improvement, whether through hobbies, fitness, or pursuing promotions, though these efforts often lead to comedic failures.

The humor in "Salaryman Yamasaki Shigeru" stems from its exaggerated yet grounded depiction of everyday life. Shigeru’s struggles resonate with the universal experiences of work-life balance, societal expectations, and the pursuit of happiness. The series balances its comedic tone with moments of introspection, offering a nuanced portrayal of its protagonist. Through its episodic structure and relatable themes, "Salaryman Yamasaki Shigeru" provides a lighthearted yet insightful look into the life of an ordinary man striving to make sense of his world.