Did you read Gamaran? I really enjoyed it. Great story, characters, varying fighting styles and weapons. Few other manga have so much emphasis on samurai, ninja and other fighting styles with strange new weapons. Gamaran shura is a continuation of the previous story. Just leap forward a couple of years. And the focus is more on Sengoku Iori, rather than Gama. This much was enough to intrigue me. But then I realized there is a mysterious sub-plot too. That was the cherry on top. So far, I've read 77 chapters in a single sitting. This is too engaging. Highly recommended if you like action manga set inTokugawa era Japan.

Make sure to read Gamaran first!
Thanks for reading!