Since 842, Sadanushi successively held various positions including Sangi (the Councilor) and Kageyushi chokan (Secretary of the Office of Investigators of the Records of Outgoing Officials) and issued 'Bengi Jushiji.'
承和(日本)9年（842年）から参議・勘解由使長官などを歴任し、「便宜十四事」を陳述。