Here's a synopsis of what he said in Japanese:
They were running some final checks on the new patch when they ran into a serious bug involving the market search. They've made some emergency fixes, and will be implementing one more countermeasure today. After that they need to run further checks to make sure that everything is stable.
At this point we're guaranteed a delay of at least two days. They were planning on releasing the patch on the morning of the Wednesday the 14th (a morning release Japan time would have been Tuesday evening in the U.S.), but that's been pushed back until at least the 16th.