| Order: | Lord of Kawachi |
| Successor: | Miyoshi Yoshitsugu |
| Sogō Kazumasa | |
| Native Name: | 十河一存 |
| Birth Date: | 1532 |
| Death Date: | April 2, 1561 (aged 29) |
| Birth Place: | Shōzui Castle, Awa Province (Tokushima) |
| Death Place: | Izumi Province |
| Nickname: | Oni Sogō |
| Allegiance: | Miyoshi clan |
| Unit: | Sogō clan |
| Relations: | Miyoshi Motonaga (father) Miyoshi Nagayoshi (brother) Miyoshi Yoshikata (brother) Atagi Fuyuyasu (brother) Miyoshi Yoshitsugu (son) Sogō Masayasu (adopted son) |
, other name Sogō Kazunari (十河 和也), fourth son of Miyoshi Motonaga, was a Japanese samurai of the Sengoku period who was a member of Miyoshi clan, daimyō of Kawachi Province.[1]
Miyoshi Nagayoshi (eldest), Miyoshi Yukiyasu (second) and Atagi Fuyuyasu (third) are his elder brothers and Miyoshi Yoshitsugu is his son (later became Nagayoshi's adopted son). He latterly adopted Miyoshi Nagaharu (Yukiyasu's son) his child.[2] [3] He adopted Miyoshi Yoshikata's son, Masayasu.[1]
His nickname was Oni Sogō as he was well known for his fighting skill and fierce like an Oni.[4] [1]