They are in most major sources (IGN, Fextralife, Steam News). The most likely scenario:
Patch 1.21.01 for Nioh: Complete Edition released on November 9, 2017 Nioh 1.21.01
The patch addressed several PC-centric launch issues found in the They are in most major sources (IGN, Fextralife, Steam News)
For veterans who never get hit. The 1.21.01 buff to the Hayabusa set makes "True Dragon Sword" and "Flowing Shadow" hit for over 20k damage. You pair this with "Agi Damage Bonus A+" on your ranged weapon. Warning: You will die in one hit on Way of the Nioh. You pair this with "Agi Damage Bonus A+"
Version 1.21.01 did not arrive with flashy new DLC weapons or costumes. Instead, it arrived as a "stability and balance" update. In the world of live-service or "Games as a Service" models, the final patch is the most critical. It freezes the game in time, declaring, "This is how the game is meant to be played." For Nioh , 1.21.01 was the final polish on a diamond that had been cut and recut for nearly two years.