"Shimajirō to Ōkinaki" is an anime series centered on Shimajirō, a cheerful and curious tiger cub, and his friends as they navigate everyday adventures and challenges. The story is set in a vibrant, child-friendly world where Shimajirō and his companions, including the mischievous rabbit Mimii, the gentle elephant Kaeru, and the wise owl Professor, explore themes of friendship, problem-solving, and personal growth. Each episode presents relatable scenarios, such as learning to share, overcoming fears, or understanding the importance of kindness, often framed through imaginative play and lighthearted humor.

The narrative emphasizes educational and moral lessons, tailored for a young audience. Shimajirō frequently encounters situations that require teamwork, creativity, and empathy, often with the guidance of his friends or family members, such as his caring mother and supportive father. The series also introduces Ōkinaki, a mysterious and magical character who occasionally appears to assist Shimajirō and his friends, adding an element of wonder and fantasy to the otherwise grounded storytelling.

The episodic structure allows for standalone stories while maintaining continuity in character development and relationships. The tone remains consistently warm and uplifting, with a focus on positive reinforcement and the joy of discovery. Through its simple yet engaging narrative, "Shimajirō to Ōkinaki" aims to entertain and educate its young viewers, fostering values of cooperation, curiosity, and emotional resilience.