However, Ōhira inherited a patrimony at Motoori house after the Norinaga's death, because Norinaga's first son, Motoori Haruniwa (本居 春庭) was blinded.
In 1802, Wakayama Domain gave an order to Ōhira to work.
Ōhira's character was gentle, his seigneur was deeply trusted in him.
Ōhira taught seigneur about classical Japanese literature and edited "Ise Zoku Fudoki (伊勢続風土記)" that was chorography.
He endeavored to succeed to Norinaga's Study and to lead the school.