The story takes place after the failed Shimabara Rebellion, led by Shiro Amakusa as a Christian uprising against the Shogunate. It ended...brutally, and Amakusa himself was executed. However, dark forces are at work, and Amakusa returns from the grave...

(Source: MU)

An adaption of Futarou Yamada's novel Kunoichi Kokihei, this story begins the year before the Battle of Sekihagara, in the pleasure quarters of the capital.
Kagerou, a real beauty who is a child of the Ootani family, meets five of the most powerful men of the Uesugi clan while serving at a brothel. But sometimes appearances can be deceiving...

The Iga clan and the Kouga clan have been sworn enemies for more than four hundred years. Only the Hanzo Hattori truce has kept the two families from all-out war. Now, under the order of Shogun Ieyasu Tokugawa, the truce has finally been dissolved. Ten ninja from each clan must fight to the death in order to determine who will be the next Tokugawa Shogun. The surviving clan will rule for the next thousand years.

But not all the clan members are in agreement. Oboro of the Iga clan and Gennosuke of the Kouga clan have fallen deeply in love. Now these star-crossed lovers have been pitted against each other. Can their romance conquer a centuries-old rivalry? Or is their love destined to end in death?

Jubei Yagyu is the head of the Yagyu Clan following the events of Demonic Resurrection and has mostly retired from the world. A group of warriors decide to ask him if he wants to take over a post at their dojo, but Jubei is more interested in watching the Noh of his friend and subordinate Chikuami.

....and that's when everything goes nuts. Yagyu Jubei Dies is the third in Futaro Yamada's Jubei Trilogy that began with The Yagyu Ninja Scrolls and continued in Makai Tensho/Demonic Resurrection.

From HappyScans

From Del Rey:
In 17th century Japan, a rebellion in the Aizu territory has been brutally crushed, leaving twenty-one brave warriors dead and most of the nuns of the local convent slaughtered. Now the surviving nuns have sworn to seek revenge.