A 48-year-old father left his exhausted seven-year-old son alone at Mount Fuji's sixth station while continuing toward the summit with his older son.
A mountain hut worker found the boy alone in rain and fog, after which police took him into protective custody and ordered his father to return from the eighth station.
The father avoided criminal charges after returning to the boy and expressing regret, while authorities warned hikers to consider the abilities and stamina of every member of their group.