Disclaimer/introduction for new players
If a sumotori gets a makekoshi (MK = losing record) his first time in that respective division, it's called "hitting the wall" (KK = winning record, means missing the wall, which is a good thing). For makuuchi this basho it's Tomokaze, Shimanoumi and Tsurugisho. Tomokaze never hat a losing record in his whole career (!), so he fights his career- and makuuchi wall. For Tsurugisho it's his first try in makuuchi. In juryo we have 4 guys to fight the wall.
Goeido and Tochinoshin had losing records at Ozeki rank last basho. Instead of getting demoted, they are now kadoban. If they get a losing record again, they will get demoted to Sekiwake. With a winning record it's back to start.
Takakeisho entered Natsu basho as new Ozeki and had to drop out injured. This means he was kadoban last basho. Because he didn't enter, he was demoted to Sekiwake. With 10 wins he has the chance for a immediate repromotion to Ozeki, just like Tochinoshin in Natsu this year. If he blows it, he'll have to start a whole new Ozeki run (~33 wins from 3 consecutive basho as Komusubi and/or Sekiwake).
Guess the colour of the giant macaron:
One of the prices for the yusho winner is a giant fake macaron (as placeholder for a load of real normal sized macarons from one of the best Pâtisseries in Paris). The colour varies and it has become a popular game to guess it.