From Shoujo-Sense:

Sasuke Sarutobi is the commander of the Sanada army’s elite force, Hayabusa. While Sasuke serves Yukimura with respect and love, within his squad he is known to be very strict and having an extremely sadistic personality.
As Sasuke twists their arms to make them stand up to it, Hayabusa members strive day after day to uphold their duty...

From Bliss:

Halfway through the Tokaido, Hisame’s adventure continues with his childhood friend Itsuki. The plot thickens as Hisame discovers things about his father, and the mysterious demon blade Senju Murasame that used to belong to him. Yakumo, a newly introduced antagonist, desperately tries to get his hands on this sword, and will use all means to achieve his goal. The only link to Hisame's past and clues to as why Yakumo wants the demon blade lies with Hisame's sensei, Hibiki. Can Hisame discover his past and put the pieces together?

Vowing never to separate from his childhood friend Hisame, Itsuki travels on the Tokaido with him in search of new adventures. Exterminating youkai along the way, they depend on each other to finish the job. What adventures lie in wait for our two protagonists?Sequel:> Toukaidou HISAME -Kagerou- ( http://mangapark.com/search?q=toukaidou-hisame-kagerou )