Lifespan: 15xx to 15xx
Lord: Miyoshi Jikkyū → Miyoshi Nagaharu → Sogō Masayasu
Father: Shinohara Nagamasa
Siblings: Nagafusa, Sakichibei, Jiton
Wife: Koshōshō (daughter of Okamoto Mokusai)
Children: Nagahide, Ukon
Shinohara Jiton served as a bushō in Awa Province during the Sengoku and Azuchi-Momoyama periods. He was the lord of Kizu Castle from the Eiroku era (1558 to 1570).
After Jiton was admonished by his older brother, Shinohara Nagafusa, for engaging in an illicit relationship with Koshōshō (the natural mother of his lord, Miyoshi Nagaharu) Jiton spoke ill of Nagafusa to Nagaharu, leading to an attack against Nagafusa in the Siege of Uezakura Castle, during which Nagafusa took his own life. In 1578, Jiton opposed having Sogō Masayasu (Nagaharu’s younger brother adopted by the Sogō clan in neighboring Sanuki Province) become the successor to the Miyoshi clan. This escalated into a battle resulting in the defeat of Jiton.
During this same period, from 1577 to 1580, Masayasu engaged in an ongoing conflict against Ogasawara Narisuke (supported by the Chōsokabe clan) for control of Shōzui Castle. After having battled against Masayasu, Jiton served in the vanguard to enable Masayasu to enter Shōzui Castle. In 1582, Jiton again sided with Masayasu to resist the invasion of Awa by Chōsokabe Motochika. Motochika was a sengoku daimyō and twenty-first head of the Chōsokabe clan of Tosa Province. Jiton did not, however, participate in the Battle of Nakatomigawa and siege of Shōzui Castle. He resisted the Chōsokabe without surrender. Nevertheless, after learning of the death of Oda Nobunaga (his sole source of potential support against the Chōsokabe) in a coup d’état known as the Honnō Temple Incident on 6/2 of Tenshō 10 (1582), Jiton vacated his base at Kizu Castle and escaped to Awaji Province.