After the death of Toyotomi Hideyoshi, the power of the Toyotomi clan declined and Japan would go to war again.
In 1600 in the Battle of Sekigahara, the Tachibana clan would ally itself with Ishida Mitsunari in the Western army against the Eastern Army of Tokugawa Ieyasu.
Ginchiyo first opposed Muneshige's decision to join the Western army.

In the Kyushu Sekigahara campaign, Ginchiyo defended the Ōtomo clan from the invasion of Kuroda Kanbei and Katō Kiyomasa.
After the defeat of Western Army in Sekigahara, the Eastern Army under the leadership of Kanbei, Kiyomasa and Nabeshima Katsushige began to march toward their doorstep, Ginchiyo organized her fellow nuns in armed resistance against the advancing army.
She faced them alone while wearing armor at the Siege of Yanagawa and protected the rearguard of Muneshige to escape.

Kuroda and Kato were old comrades-in-arms of Tachibana Muneshige from the days of the Korean invasion, and following the unexpected and challenging resistance of Ginchiyo, they proposed that she and her ex-husband should surrender and join them in a campaign against Shimazu Yoshihiro, who was also from the Western Army and fled from Sekigahara.
Muneshige agreed, but Tokugawa leyasu ordered the campaign to stop almost before it had begun because he did not want a further war in Kyushu.
Ginchiyo and Muneshige was pardoned nonetheless.
The Tachibana family was deprived of their domains in the aftermath of Mitsunari's defeat.
Muneshige thanked Ginchiyo for helping him in battle and they both went their own way.
After the death of Toyotomi Hideyoshi, the power of the Toyotomi clan declined and Japan would go to war again. In 1600 in the Battle of Sekigahara, the Tachibana clan would ally itself with Ishida Mitsunari in the Western army against the Eastern Army of Tokugawa Ieyasu. Ginchiyo first opposed Muneshige's decision to join the Western army.
In the Kyushu Sekigahara campaign, Ginchiyo defended the Ōtomo clan from the invasion of Kuroda Kanbei and Katō Kiyomasa. After the defeat of Western Army in Sekigahara, the Eastern Army under the leadership of Kanbei, Kiyomasa and Nabeshima Katsushige began to march toward their doorstep, Ginchiyo organized her fellow nuns in armed resistance against the advancing army. She faced them alone while wearing armor at the Siege of Yanagawa and protected the rearguard of Muneshige to escape.
Kuroda and Kato were old comrades-in-arms of Tachibana Muneshige from the days of the Korean invasion, and following the unexpected and challenging resistance of Ginchiyo, they proposed that she and her ex-husband should surrender and join them in a campaign against Shimazu Yoshihiro, who was also from the Western Army and fled from Sekigahara. Muneshige agreed, but Tokugawa leyasu ordered the campaign to stop almost before it had begun because he did not want a further war in Kyushu. Ginchiyo and Muneshige was pardoned nonetheless. The Tachibana family was deprived of their domains in the aftermath of Mitsunari's defeat. Muneshige thanked Ginchiyo for helping him in battle and they both went their own way.
Tachibana Ginchiyo