I’m watching Arc Revolution Cup 2015 livestreams which is Arc System Works’ fighting game tournament. Only for today. Expect BlazBlue Chronophantasma Extend and Guilty Gear Xrd finals in a couple of hours from now.
Main event: http://live.nicovideo.jp/embed/lv230763274
Side event (Now playing Persona 4 Arena Ultimax, UNIEL[st] ended hours ago): http://live.nicovideo.jp/embed/lv230763370
Alternatively you can watch both of them from this page.