The historical fact is unknown, but it was true that Tadatsugu died young and Tokuhime also died in the same year (but in fact, Tokuhime died 19 days earlier than Tadatsugu).
史実は不明だが、忠継が早世し、督姫も同年に亡くなったのは事実である（但し、実際には亡くなったのは督姫の方が19日早い）。