In Old Korean, "弓月" could be read as "Kundara (궁달아)" which is thought to have carried over to the Japanese language as being of Baekje descent as both words share the same pronunciation.

As mentioned in Nihon Shoki, Yuzuki no Kimi claimed he had 120 people in Mimana, a place name that points to the Gaya confederacy in Korea.

Though not directly stated in either Nihon Shoki or Shinsen Shōjiroku, modern Japanese scholars theorize Silla was the place of origin of the Hata clan.

[4][5][6] After extensive research and historical analysis, Japanese historians have concluded that the Hata clan originated from Silla and not any of the previously mentioned kingdoms.

They were later given official titles ranging from "Toroshikō (登呂志公)", "Hatano Sakeno Kimi (秦酒公)" and "Uzumasa (禹豆満佐/太秦)" after being recognized as a legitimate clan of Japan.

It is thought that the misconception revolving around the origins of Jinhan (previous kingdom of Silla) being built by Qin Dynasty refugees, first mentioned in San Guo Zhi, was what caused the Silla immigrants to become descendants of the Qin Dynasty in Shinsen Shōjiroku (see History of Jinhan Confederacy).

[13] It also contradicts the claims made in Nihon Shoki (the first and oldest mentioning of Hata) that Yuzuki no Kimi was from Qin Dynasty and not Baekje without providing any substantial evidence.

Further research points to a specific area in Silla known as "Padan (파단/波旦)" read as "Hatan (はたん)" in Japanese, located in Uljin County as the origin of the Hata clan.

Other evidence alludes to the foreign origins of the kami Inari, a deity that looks over foxes, fertility, rice, tea and sake, of agriculture and industry, of general prosperity and worldly success.

[22] It states that during the Three Kingdoms period, foxes were widely celebrated as gods and were deified as protectors of agriculture and prosperity due to the influence of Buddhism.

This sentiment was later carried over to the Japanese archipelago by the Hata clan and other immigrant clans which arrived in Japan in the earlier centuries[20] and was given the name "稲荷 (いなり)" in kanji which means "carrying rice", (literally "rice load") first found in the Ruijū Kokushi in 892 AD.

During the reign of Emperor Nintoku (313-399), the members of the clan were sent to different parts of the country to spread the knowledge and practice of sericulture.

Emperor Yūryaku granted the clan the family name of Uzumasa in 471, in honor of Sakeno kimi's contributions to the spread of sericulture.

Based on "personal research and observation", the book claimed the Japanese as the descendants of the Ten Lost Tribes.

A recently published study of the genetic origins of Japanese people does not support a genealogical link as put forward by Saeki.

[27] Researcher and author Jon Entine emphasizes that DNA evidence excludes the possibility of significant links between Japanese and Jews.