The 36th NHK Taiga Drama is Mori Motonari. This series chronicles the life of Mori Motonari, a warlord of the early 1500s who stood at the vanguard of the Warring States era. All Japanese school textbooks contain the Mitsuya no kyokun, Mori's famous lesson to his three sons that teaches that while one arrow is easily broken, three arrows together cannot be broken. In 1997, 500 years after his birth, NHK dramatizes Motonari's rise from a chief of the region of Aki (now Hiroshima) to a daimyo who rules over ten provinces of the Chugoku region.