Niu Masamune is a daimyō who reigns over Satsuma and Osumi Provinces.
He married at least twice. His second wife was only known as Lady Niu. He was also the father of Niu Masahito, Niu Yukiko, Midori and Niu Keiko. Of the four, only Masahito was a child of Lady Niu, while the three daughters were children of an unnamed concubine. During the investigation of Yukiko's murder he was not in Edo, leaving Masahito as Lord Niu in Edo.
- He possessed one of the closest yashiki to Edo Castle due to his wealth and power.
- As his family was one of those that lost in The Battle of Sekigahara he could not obtain a government post.
- The family symbol is a red dragonfly within a red circle that is painted on a white banner.
|Sano clan||Sano Ichirō • Reiko • Masahiro • Akiko • Etsuko • Sano Shutarō|
|Yangisawa clan||Yanagisawa Yoshiyasu • Lady Yanagisawa • Yoritomo • Kikuko • Yoshisato|
|Hirata clan||Hirata • Midori • Taeko • Tatsuo • Chiyoko|
|Tokugawa clan||Tokugawa Tsunayoshi • Ienobu|
|Niu clan||Niu Masamune • Lady Niu • Niu Masahito • Niu Yukiko|