Incidentally, it is known that Jufukuin and Hoshunin were on very bad terms (although Hoshuin seems to have been on good terms with other concubines, because she petitioned the bakufu [Japanese feudal government headed by a shogun] to appoint Toshitaka MAEDA, another concubine's son, as a daimyo [Japanese feudal lord]).
ちなみに芳春院とはかなりの不仲であることで知られる（芳春院は他の側室とは仲が良かったらしく、別の側室出生の前田利孝の大名取り立てを幕府に訴えたりしている）。