Finished watching the match on my HDD, and then I was watching JCF play, so sorry for this late post!
Shame Kei couldn't convert one of those BPs in the third set. But Nole, even probably at not his best, was the better player especially on big points. Kei later appeared on Japanese TV and said that although he's a bit angry with himself for not taking his chances, he thinks it was a worthy experience to play against a top guy like Djokovic so soon after coming back from the elbow injury. He also said he enjoyed playing out there.
His next tournament is likely to be Queens, if he gets in MD as an alternate or received WC. As for Wimbledon, he said it's more likely he will play qualies. But we'll see.