Shura no Toki is a spin-off series to the author’s most well-known series Shura no Mon.
It has been three years since the manga’s previous chapter “Showa-hen” that ran from September 2015 to January 2016.
While the main series focuses on Tsukumo Mutsu, the current successor of the Mutsu Enmei Ryu style with one thousand undefeated history, the spin-off has told stand alone stories featuring the style’s successors in different time periods of Japanese history. more focusing on assassination skills, Fuwa Enmei Ryu.