Suzuki Shigeoki served as a bushō during the Sengoku period. He was a kokujin, or provincial landowner, and a member of the Saikatō-Suzuki clan in Kii Province. His common name was Magoichi.
Shigeoki’s name first appears in a military chronicle from the early Edo period that is a compilation of former retainers of the Hatakeyama clan who served as the military governors of Kii Province.
In the second month of 1560, Miyoshi Jikkyū raised arms at Kishiwada Castle in Izumi Province. Hatakeyama Takamasa, the head of the Kishū-Hatakeyama clan responded by deploying 24,000 mounted soldiers ranging from senior retainers of the family to kokujin. Members of the Saika Group joining this deployment included Suzuki Magokurō Shigemune, Dobashi Koheiji Taneoki, and Suzuki Magoichi Shigeoki. The Saika Group brought along 1,800 mounted soldiers and had them provide security for Tanabe Motomasu in the vanguard.
In the fourth month of 1569, senior retainers of Oda Nobunaga including Shibata Katsuie and Sakuma Nobumori attacked the Miyoshi clan holed-up at Takaya Castle in Kii Province. Takaya Castle was originally the base of the Hatakeyama clan so Takamasa mobilized 8,500 mounted soldiers including senior retainers and kokujin to serve as reinforcements to the Oda army for purposes of recapturing the castle. As members of the Saika Group, Shigeoki along with Dobashi Taneoki appear in the chronicle but there are no further details concerning his actions. Owing to the name and time period, he is believed to be the same individual as Suzuki Shigehide.