Maximum is 100 slots and the pricetag is 100 koban per slot all the way to the end.
thx. I'm sitting on 58 now but it's getting cramped.
100 huh? That's still good.
Do i really have to spend 50 Koban to participate on the tournament?
No. You can enter your initial team for free. If you want to subsequently change your team within the same tournament, that costs 50 koban. Changing your team is mainly for people who have made it to at least the round of 16 to that they've seen the teams of their possible opponents, and see that their current team will lose to an opponent, but but they'll win if they change it. You get 100 koban for winning a semifinal match and 200 for winning the finals, so a change that you reasonably expect will get you a victory in the semifinals is worth it.
You can sign up for the tournament anytime between midnight Monday morning and 7 pm Tuesday. Everyone who signs up anywhere in that time interval is part of the same tournament. Preliminary matches to bring the field down to 32 happen on 8 pm Tuesday, then another round at 8 pm on each of Wednesday, Thursday, and Friday. The semifinals and finals are at 8:30 pm and 9 pm on Friday. The timer is that you have to wait for the scheduled time of the next match before it takes place.