He was entrusted with an important position because Terumoto MOURI's mother came from the Naito clan, but when his adopted son, Motomori NAITO, made a triumphal entry into the Osaka-jo Castle in the Siege of Osaka, he was forced to commit seppuku with his son, Motoyoshi NAITO, and the fortunes of the family declined.
毛利輝元の母が内藤氏の出身であったため重用されたが、その養子内藤元盛が大坂の陣で大坂城に入城したため子の内藤元珍らもともに切腹し没落した。