Ietane was the 2nd son of Ryûzôji Takanobu. He fought at the battle of Okitanawate and when he learned that his father had been struck down, he grabbed a handful of spears and plunged into the enemy ranks. He fought valiantly before being forced to fall back with the rest of the army. He later became a retainer of Nabeshima Naoshige. He died in Korea in 1593, though just how is a matter of debate. One opinion is that he succumbed to illness - another has that he fell in battle.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005