Netflix adapted programme.
I haven't watched it all yet but for those not familiar with the manga (I wasn't) here is a summary.
Since the Edo periods of Japan, gladiator arenas exist in certain areas. In these arenas, wealthy business owners and merchants hire gladiators to fight in unarmed combat where winner takes all. Tokita Ohma, nicknamed "Asura", joins these arenas and devastates his opponents. His spectacular ability to crush his enemies catches the attention of the big business owners, including the Nogi Group chairman, Nogi Hideki.
Animation is top. Voice acting is great. Action is brilliant. If you like hajime no ippo you'll like this.
Worth the watch (I'm on ep 5 at the mo)