I have tried several options, but have ended up subscribing to NHK Premium through Oceania TV Sydney Australia. It is AU$49.95 three monthly, and I have a satellite reception disk (not big) a smart card and tuner. Here in NZ reception is perfect. I can select bilingual for the sumo and can have it in English if I want. It may be considered expensive but have tried other ways, internet, etc but the buffering and breaks in transmission drove me mad. Unless its pelting down, then the transmission breaks up a little, I can enjoy a perfect two hours of sumo.