Suzuki Magoichi (鈴木孫一、鈴木孫市?), better known as Saiga Magoichi or Saika Magoichi (雑賀孫一、雑賀孫市?), (c. 1534 – c. May 2, 1589) was the name given to the leader of the Saika Ikki. He is famous for arming his troops with arquebuses and donning the yatagarasu as his family crest.
There were three people known as Saika (Suzuki) Magoichi, included Suzuki Sadayu (鈴木佐大夫, 1511–1585, true name Suzuki Shigeoki (鈴木重意)), Suzuki Shigetomo (鈴木重朝, 1561–1623) and Suzuki Shigehide (鈴木重秀, c. 1546 – c. 1586).
Shigeoki (鈴木重意, 1511–1585), also known as Suzuki Sadayū (鈴木佐大夫), was Shigehide and Shigetomo's father (though the former is disputed). Since records regarding the first half of his life are scant, it is speculated that he traveled as a mercenary. He was employed by the Hatakeyama clan and was a major contributor for repelling the Miyoshi clan. His reputation as a fearsome warrior began to spread and he became a kokujin in the area. When the Miyoshi clan were being attacked by Oda Nobunaga in 1570, the Ishiyama Hongan-ji mob assisted the resistance against the conqueror. Shigeoki came to their aid and led 600 riflemen into battle. His efforts won him fame when he injured one of Nobunaga's valued generals, Sassa Narimasa. Kennyo continued to count on Shigeoki's reinforcements. During this time, Nobunaga was said to have called him "Kennyo's left and right-hand man".