In addition, he won Emperor Uda's esteem and was assigned to serve as Fusen jokyo, a commander who led dajokanpu (official documents from the Grand Council of State) 28 times, and from the fact that he served as the president of Senkokushisho (an organization which edits national history books) when the editing of "Nihon Sandai Jitsuroku" (sixth of the six classical Japanese history texts) began even though there were 2 other senior commanders like MINAMOTO no Toru and FUJIWARA no Yoshiyo, also in 895, he submitted a personnel proposal for promotion in rank (generally, both of these roles were played by Regents and Chancellor Ichinokami - Minister of the Left), Yoshiari pushed forward the peaceful era of Kanpyo as a factual administration after FUJIWARA no Mototsune died.
更に宇多天皇の信任が厚く、符宣上卿（太政官符を発給する際の上卿）として28回も名を連ね、『日本三代実録』編纂開始時には源融・藤原良世と先任の上卿2人がいるにも関わらず撰国史所総裁を務めていること、寛平7年（895年）には位階昇進の人事草案を提出する擬階奏を行っている（いずれも摂関もしくは一上が務める慣例であった）ことから、藤原基経没後は能有が事実上の政権担当者として寛平の治を押し進めたと考えられている。