Wow, what a horrible ending to a complete monster of a match
LJK was incredibly clutch from 9-9 in the sixth and 8-10 in the decider. When he went up 11-10 in the decider he looked completely numb. One of the best matches I have seen in recent years, and the last point was amazing up until the controversy.
If I had to call it as a neutral umpire from my PC screen, I think Matsudaira was right, but it's hardly possible to make a quality decision like this. After the point was called in favor of LJK, he was deliberately shaking hands as quick as possible with both umpires. Not the classiest of behaviors, but legitimate since it was the umpire's decision.
On top of that, this match for LJK wasn't an ordinary match. If he lost to a foreigner from 5-1 up in the seventh game I doubt he would have gotten another chance. Heartbreaking for Kenta, but there is no question who needed this more.