Kentarō Okamoto's path began in rural Japan, where childhood encounters with an elderly hunter's lifestyle profoundly shaped him. This early influence drove his decisive move in 2009, leaving Tokyo behind to return to Okayama Prefecture and embrace hunting as his profession.

His documented journey details the practical shift from city life to mastering wilderness survival and hunting methods. This encompasses using air rifles and traps to capture game, followed by the meticulous processes of field dressing, preparing, and consuming various wild animals. The narrative spans the full range of hunting activities, highlighting hands-on experience and skill development within natural settings.

His story was serialized in Kodansha's *Evening* magazine from February 2011 to August 2016, compiled into seven tankōbon volumes. A direct sequel, *Sanzoku Diary SS*, continued the narrative starting in December 2016.

An animated adaptation, a 15-minute OVA bundled with the limited edition sixth manga volume on June 23, 2015, specifically adapts events from the manga's first volume, focusing on his foundational experiences and initial challenges as a hunter.