On December 24, 1689, his father died in Osaka, and thereby Nobutoyo, the first son, inherited 300 goku, and Nobukiyo, the second son, 150 goku.
元禄2年(1689年)12月24日に父が大坂にて死去し、長男の信豊が300石、次男の信清が150石をそれぞれ継いだ。