I'm not a fan of anime but my friend requested me to make any sword from Touken Ranbu anime. And when i see they are amazing so I'm interested to make this 3d model.
I do not know much thing about the anime so maybe there's a missing detail in the model. I'm sorry for that.
Started from highpoly, and then make the lowpoly. Unwrap the lowpoly. bake textures(tangent normal, AO, color id) from high poly to lowpoly. Next thing is to paint some pattern detail on blade's scabbard, and tweaking a bit of the normal map, ambient occlusion map, and color id map of the scabbard. The last thing is final texturing in Substance Painter.