Kentarō Okamoto is a Japanese manga artist and writer, best known for creating works that draw heavily on his personal experiences with hunting and survival in rural Japan. He was born in Okayama Prefecture and has cited his upbringing in a deeply rural area as a significant influence on his career. Before becoming a professional manga creator, Okamoto worked at a regular company. His interest in the outdoors led him to return to Okayama in 2009, where he obtained a hunting license and began working as a part-time hunter, a pursuit that directly shaped his most notable works.

Okamoto is the author of Sanzoku Diary, a manga that is grounded in his own experiences as a hunter. The series, which began serialization in 2011, offers a realistic and detailed account of hunting, field dressing, and living off the land. His hands-on knowledge of survival techniques, trapping, and the use of air rifles became a hallmark of his storytelling. A sequel to this work, Sanzoku Diary SS, began publication in 2017. One of his most commercially successful projects is the manga Are You Lost?, for which Okamoto provided the original concept and story. The series, illustrated by Sagara Riri, focuses on a group of schoolgirls stranded on a deserted island and uses its premise to showcase practical survival skills. It was serialized in Weekly Young Magazine from 2017 to 2022.

Okamoto's work is distinctive for its authentic and instructional approach to wilderness survival, a direct result of his own life as a licensed hunter. This focus on practical knowledge, presented within the framework of a narrative, is a recurring element in his projects. The realism in Sanzoku Diary, which blends memoir-like accounts with educational content about Japan's hunting culture, represents a significant portion of his creative identity.

Regarding adaptations, the manga Sanzoku Diary received an animated adaptation in the form of an original video animation (OVA). This 15-minute OVA was bundled with the limited edition of the manga's sixth volume, released on June 23, 2015, and it specifically adapts events from the first volume of the series. His other major work, Are You Lost?, was also adapted into an anime television series, further extending the reach of his survival-based narratives.

Kentarō Okamoto holds a unique position in the manga industry, distinguished by his authentic, lived-in expertise. By integrating his professional background as a hunter directly into his manga, he has created a body of work that stands out for its realism and educational value, moving beyond typical genre conventions to offer genuine insight into survival and the life of a modern Japanese hunter.