Sorry, I forget if it was Prime, Netflix or HBO. It's one of those 3 where I found it by just looking at "others have also watched". Boring as heck for the first 20 min or so and could have done with a little more action. But still good.
Glad to find other "samurai" genre fans. FWIW, I loved the last 30 min and the Lucy Liu fight scene of Kill Bill vol 1 starting with
https://youtu.be/Xb_rVO7H3g0
Fantastic movie (vol 2 sucked) and it was great they brought back some old MA legends. Only big problems I had was David Carradine (even more so after circumstances of his death) and the initial wake up from coma scene.