Kamuyaimimi-no-mikoto

, is a figure in Japanese mythology and one of the three brothers born to Emperor Jimmu and his wife Himetataraisuzu-hime. He is best known for his role in the Assassination of Tagishimimi, in which he and his brother Suizei killed Tagishimimi in order to protect Suizei from assassination.

According to the Kojiki, Kamuyaimi-no-Mikoto was the elder brother of Suizei, and would have been expected to ascend the throne as emperor according to the lineage. However, he passed the throne on to his younger brother, Suizei, instead. This was seen as a humble and selfless act, similar to the "oath of subordination" between the brothers Yamayukihiko and Umiyukihiko.

The Kojiki also states that Kamuyaimi-no-Mikoto appointed Takeiotatsu no Mikoto, a grandson of Kamuyaimi-no-Mikoto, as the national governor. This appointment is believed to be the first time the king of Japan was appointed to the position of Kunizukuri. The palace of Shikinomizugaki was the palace of the 10th Emperor Sojin. and the Aso clan. The descendants of Kamuyaimimi-no-mikoto have left traces all over Japan, from Kyushu to the Tohoku region. They supported and solidified the "Emperor System" founded by Emperor Jinmu. Taian Manpo, who compiled the Kojiki, is a descendant of Kamuyaimi-no-Mikoto.