After this, Otsugu broke one after another the records of promotion in the past, for example, Otsugu was promoted to Shogoinoge (Senior Fifth Rank, Lower Grade) at the age of 24 and, two days later, Otsugu was further promoted by virtually four ranks to Jushiinoge (Junior Fourth Rank, Lower Grade) to be Emonfu (details are separately described) and Otsugu at a young age of 29 was promoted to Sangi which was the same rank as his father's.
その後24歳で正五位下に昇進したわずか2日後には従四位下へと事実上4階級昇進して衛門府となるなど、これまでの出世の記録を次々と破る結果を残し（詳しくは別記）、延暦21年には29歳の若さで父・百川と同じ参議に昇進した。