Although Shigetoki was the oldest son of Shosan SUZUKI, his father Shosan became a priest and adopted his nephew Shigenaga to make him succeed to the family, and therefore, Shigetoki was adopted by his uncle Shigenari, and later set up a branch family to establish his own family line.
鈴木正三の長男であるが、父は出家し甥の重長を養子にして家を継がせたため、重辰は叔父の重成の養子となり、のちに分家して一家を興した。