As announced during their always interesting preview show, the NHK World team will be broadcasting the final 50 minutes of Makuuchi live on the NHK World stream. In fact they will be doing 3 days of live streaming this basho, days 1,8 and 15. If you plan to tune in, the start times are (US)
3:10 AM Eastern / 2:10 AM Central / 1:10 AM Mountain / 12:10 AM Pacific
At the moment team Tachiai is not planning to cover day 1, though we may put together a Grand Sumo Live open thread for readers to share their discussion during the show.