Sasayama Sukeie served as a bushō during the Azuchi-Momoyama period.
The Sasayama clan were a branch of the Ōhara family and counted among the Fifty-Three Families of Kōka. The families allied with the Rokkaku clan of southern Ōmi Province during the Chōkyō-Entoku Conflict and were also known for the Kōka style of ninja military arts.
Sukeie was born as the son of Ōhara Kagemoto (Kagesuke).
Initially, he served Oda Nobunaga, and the associated with Hashiba Hideyoshi. In 1584, at the Battle of Komaki-Nagakute, Sukeie and his father were accused of being on friendly terms with Oda Nobukatsu so were discharged from their duties and became rōnin, or wandering samurai, living in seclusion in the environs of Seki-Jizō. In 1596, when Tokugawa Ieyasu marched to Kyōto, Sukeie was called upon by the Tokugawa and received a stipend of 1,000 hyō of rice. In 1599, he served as a representative of the clan in Ise Province.
On 6/18 of Keichō 5 (1600), as Tokugawa Ieyasu entered Ōzu Castle while heading out on the Conquest of Aizu, Natsuka Masaie (one of the Five Commissioners from the Toyotomi administration) came to offer greetings. The next morning, Masaie said that he would like to invite him to breakfast, whereupon Sukeie responded that Ieyasu would also join. Knowing that Masaie was plotting to assassinate Ieyasu, Sukeie informed Ieyasu and, in the night, served as a guide to move him from the Ishibe lodge (the fifty-first of fifty-three lodges along the Tōkai Road) via a side road to the Tsuchiyama lodge (the forty-ninth lodge). Having arrived safely, Ieyasu recognized Sukeie with an item to attach to the waistband. Later, at the Siege of Fushimi Castle, Sukeie, together with his eldest son, Hikojūrō Kagehisa, fought to defend the castle but were killed in action along with thirty-one troops from Kōka.
Sukeie’s second son, Sukemori (Suketomo), was engaged by Ieyasu, succeeding his father as the representative of the Tokugawa in Ise. He participated in the Siege of Ōsaka. In 1625, his rights were recognized to inherited landholdings of 480 koku in Toriino in Kōka, After the war, Sukehisa’s son, Suke Kagesue, received 200 koku while his descendants served as hatamoto, or direct retainers of the Edo bakufu. Nine generations after Sukeie, Sasayama Jūbei Kageyoshi became the Commissioner of Sado. In the tenth generation, Sasayama Kagenori became the Commissioner of Sado, and after supressing an uprising in Sado, was promoted to the position of Inspector-General and conferred with the rank of Junior Fifth Rank (Lower).