Born into a family of yoriki, police officials of the Osaka magistrate's office.
Around this time he began working at the magistrate's office as an apprentice, later becoming a yoriki.
Around this time he studied Wang Yangming's teaching that knowing and acting are one, and opened a private school, the Senshindō, at his home.
He cracked down hard on official corruption and became known as an upright, outstanding yoriki.
He passed his post to his adopted son and retired, devoting himself to scholarship and teaching.
In the Tenpō famine rice ran short even in Osaka and people starved. Ōshio begged the magistrate's office for relief but was ignored, while it shipped rice to Edo.
He sold his treasured library and distributed the money to the poor.
With pupils and peasants he rose in arms and attacked the houses of rich merchants in Osaka. The revolt was crushed within half a day, but a rebellion led by a former shogunate official deeply shocked the regime.
He hid in Osaka for a while but was discovered, and took his own life.
Rai San'yōHirose TansoAizawa SeishisaiNinomiya SontokuWatanabe KazanMizuno TadakuniMatthew C. PerryPhilipp Franz von Siebold
People of the Edo period ・ People by period
Based on facts found in textbooks and biographies. Uncertain points are marked as such.