-Ichijou gets a phone call from someone (his superior?) after Kaiji returns. I don't know what it was about, but it made him a lot more nervous about the outcome of Kaiji's game.
-Ichijou has this remote control that can be used with the pachinko machine. I don't know what it does specifically.
-I'm not entirely sure as to how Kaiji wins, but it looks like he clogged all the losing holes with balls so there was only one path to victory.
-Kaiji wins, chairman's pissed, and Ichijou is last seen being dragged away by blacksuits. The chairman does make mention of "1050 years" in reference to Ichijou. Maybe 1050 years of hard labor as punishment? As with Tonegawa, Kaiji didn't feel too great seeing another one of the chairman's underlings be taken away.
-Endou, Kaiji, and Mikoko's Dad spend the rest of the night in a fancy hotel with giant stacks of money, eating food and getting drunk. Mikoko's Dad and Kaiji pass out. When they wake up, Endou's gone and it looks like he took his share of the money, too.
-Kaiji uses his money to free the people that he met at Teiai. He starts crying because he barely has any money left to spare to go party with his friends as he watches them from afar. Looks like a blacksuit feels bad and hands him some money, so Kaiji runs off to join the other former Teiai workers, and that's where series 2 ends.
I didn't realize how long my summary was. Oops.