Sunomata Castle (墨俣城, Sunomata-jō) is a Japanese castle in Ōgaki in Gifu Prefecture. It was constructed by Toyotomi Hideyoshi, one of the generals of Oda Nobunaga, while they were pressing the Siege of Inabayama Castle in the mid-16th century. Hideyoshi also found a secret path into the castle and they found Saitō Tatsuoki. Oda Nobunaga put him in exile as they were victorious in this war. According to legend, Sunomata Castle was built overnight. Today, it is referred to as Sunomata Ichiya Castle (墨俣一夜城 Sunomata Ichiya-jō).