Incidentally, in most cases, Nobunaga used adopted daughters for political reasons, to marry into Daimyo (Japanese feudal lord) families: rather than bringing them up, he adopted girls in form only and gave these adopted daughters away in marriage.
因みに、信長は大名間の政略婚にはほとんど養女を用いていた（育てた訳ではなく、形式上養女にして送り出す形）。