Toyotomi Hideyori was the son and designated successor of Toyotomi Hideyoshi, the general who united all of Japan toward the end of the Sengoku period. His mother, Yodo-dono, was the niece of Oda Nobu

Ōno Harunaga was a general under Toyotomi Hideyori, and fought in the Siege of Osaka in 1615. He became lord of Osaka castle after the Battle of Sekigahara. Ono led forces against those of Wakayama Ca