Who Is Kamununakawamimi (later Emperor Suizei) (Emperor Suizei)?

Emperor Suizei is the figure the Kojiki names as the second emperor of Japan; his name was Kamununakawamimi. He was the youngest son of Emperor Jimmu and Isukeyorihime.

When he understood the warning hidden in his mother's songs, he asked his elder brother Kamuyaimimi to kill their half-brother Tagishimimi, who was plotting against them. But his brother's hands and feet shook and he could not do it. So the younger brother took the weapon from him, went in himself, and killed Tagishimimi. Saying, "I failed to strike down our enemy, so I should not stand above you," the elder brother gave up the throne, and the younger became emperor, ruling from the Takaoka Palace in Katsuragi.

For his bravery on that day, he was also praised as Takenunakawamimi — "the brave Nunakawamimi."