Shura no Mon

This is a manga I used to love and read many times. It's a fighting action series where the successors of the legendary martial art 'Mutsu Enmei Ryū' confront historical figures like Miyamoto Musashi and Sakamoto Ryoma, shaking the era. It's a side story depicting the fierce battles and destinies of solitary warriors who have proven their strength behind the scenes of history. I recommend it.