In August of 1615 he parceled out 10,000 koku each to his 4th son Nagamasa and his 5th son Naonaga, and kept 10,000 koku for his own retirement.
元和(日本)元年（1615年）8月、四男長政、五男尚長にそれぞれ1万石を分け与え、長益本人は隠居料として1万石を手元に残した。