[2]However, due to conflicting details across several sources that claim different origins of Achi no omi, several theories have been proposed by modern historians.
According to Shoku Nihongi (797), it is said that he was the great-grandson of Emperor Ling of Han (other sources said he was still a descendant of Emperor Xian of Han being either his grandson or great grandson) which is the reason why his clan was named "東漢" meaning "Eastern Han" in Chinese characters.On the contrary, older documents such as the Nihon Shoki (720) and Kojiki (711) state that Achi no omi and his clan, the Yamatonoaya clan had originated from the kingdom of Baekje.
According to Japanese scholars, Wani and Achi no omi founded Kawachinoaya and Yamatonoaya clan respectively, both being of Baekje origin and influential ethnic Koreans in Japan at the time.
[12][13] Much like the Hata clan, modern Japanese historians state that historical and archeological evidence allude to Korean origins (specifically of Baekje or Gaya), therefore in recent times, Achi no omi and his clan are perceived as Korean in Japan.
[14][15] Regardless of his likely ethnicity, the truth surrounding Achi no omi and the other prominent immigrants such as Wani and Yuzuki no Kimi remain skeptical with modern historians considering them as fictional individuals whose stories were added later to help create origin stories for clans with foreign backgrounds.