| Harima no Tsubone (播磨局) | |
| Office: | Chief of the Amakusa clan Castellan of Hondo castle |
| Term Start: | 1233 |
| Term End: | Unknown |
| Predecessor: | Amakusa Taneuji |
| Successor: | Amakusa Tanezane |
| Nationality: | Japanese |
| Unit: | Amakusa clan |
Harima no Tsubone (播磨局) was a Japanese female samurai warlord and chief of Amakusa clan during the mid-Kamakura period (1185–1333). She was the daughter of Amakusa Taneuji, a warrior from Hizen Province. She is best known for her role in defending Shimoshima island during the Mongol invasions of Japan. Her given name was Ōkura no Ōiko (大蔵太子).[1]
Harima no Tsubone's father, Amakusa Taneuji, who was descended from the Ōkura clan, was the lord of the newly developed territory of Shimoshima Island in Amakusa. Shimoshima is connected to Kamishima island, and through it to Kyushu mainland.
In 1233, he entrusted the position of head of the territory, which was part of her main estate, to his daughter Harima, thereby making her the head of the Amakusa clan. She received Hondo Castle (ほんどじょう), a mountain castle, as her property. She was allied with the daimyo of the Okura clan.
In 1281, during the Mongol invasions of Japan, Harima no Tsubone personally led troops into battle and achieved military success due to the miraculous power of Suwa Myojin. In 1283, she had a branch shrine of Suwa Taisha established within her territory, known as the Moto-watari Suwa Shrine. Additionally, she established the Kemmyōji temple in Kamegawa as her father's memorial temple and donated temple land. Having no children of her own, she adopted her nephew, Tanezane, as her heir, who then succeeded her as the head of the Amakusa clan. Tanezane also distinguished himself in battle and was appointed to a high position within the Amakusa clan during the Mongol invasions.