Naikikyoku had a shortage of people, and so Emperor Junna appointed Yoshitada to Shonaiki (an official working at Nakatsukasa, or the Ministry of the Central Office) in June, 830, because the Emperor highly valued his literary talent.
折りしも内記局の人材不足が問題となっており、淳和天皇が善縄の文才を評価して同年6月に少内記に任命された。