[2] In 1578, he rebelled against the Ōtomo clan and attacked Iwaya Castle in Chikuzen, but later switched sides after his daughter married Takahashi Tsunematsu, the son of Takahashi Shouun.
[1] In July of that year, he lost Katsuo Castle in an attack by the army of Shimazu Yoshihisa.
[1][2] The following year, Hirokado joined Toyotomi Hideyoshi, who gave him Kamitsuma County in Chikugo Province.
[1] During the Battle of Sekigahara, Hirokado served with the western forces of Ishida Mitsunari.
[1][2] Following defeat, he took refuge with Katō Kiyomasa of Higo.