He tried the whole match to get his upper left and was cleverly denied. As for slaps, he often starts a bout with a slap-I suggest you go to the videos and watch more closely. He's going for a record-he won't throw anything, especially since Harumafuji looks like an unstoppable runaway bulldozer this basho. I seriously doubt he will beat him. I say he lost the yusho today.
Hakuho favors throws with his left as his power arm. He had it locked and was trying to get his right around. More than that though, Hakuho's movement was subdued. Rewatch it and watch the way he doesnt put up fierce resistance especially towards the last third. Have a hard time believing Hakuho doesn't use and prevail with his better strength against Kotoshogiku - and that Kotoshogiku would win in that fashion. HarumaFuji has looked good, but I dont know about unstoppable.