As the dialects of the Togoku region of the period are frequently used in most of the poems the 'Azumauta' has an important position as a specific record of these ancient dialects, even though the year the poems were composed, the profile of the composers, and how they were recorded remain unknown.
多くの歌で上代の東国方言が多用されており、歌の成立年代や作者の出自、記録の経緯が一切不明という問題点はあるにしても、古代の方言の具体的な記録として重要な位置を占める。