PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FCP)

UTG+1 (t3105)
MP1 (t4035)
MP2 (t2915)
MP3 (t2485)
Hero (t2935)
Button =#A500AF(Villain)/ (t2525)
SB (t2305)
BB (t6695)
UTG (t2770)

Preflop: Hero is CO with K , A .
UTG calls t50, 2 folds, MP2 calls t50, 1 fold, Hero raises to t200, Button =#A500AF(Villain)/ calls t200, 1 fold, BB calls t150, UTG calls t150, MP2 calls t150.

Flop: (t1025) J , Q , K (5 players)
BB checks, UTG checks, MP2 checks, Hero checks, Villain checks.

Turn: (t1025) 8 (5 players)
BB checks, UTG checks, MP2 checks, Hero bets t400, Villain raises to t800, BB folds, UTG folds, MP2 folds, Hero calls t400.

River: (t2625) 8 (2 players)
Hero checks, Villain bets t1525 (All-In), Hero __________.

1. Raise more pre-flop
2. Bet on flop. At least 1/2 to 3/4 size of pot.
3. Fold river. Have to have a very solid read to call here.

Bringing 4 other people along for the ride by checking this flop is criminal. You don't need to get crazy, but put 1/2 pot out there at least to get some info.

As played, I'd probably put a blocker bet out there on the river.

Are you serious? Pot is 2,625. Button has 1525 left. What amount are we going to bet, 500? 750? Any reasonable bet pot commits you to the hand.

I'm betting that flop every time.

Raise more preflop or limp; make it more expensive to call or limp to disguise your hand.

Bet the flop with a CB - very scary but you have a backdoor nut flush draw, gut shot to the nut straight along with TPTK.

As played, I fold the river as villain could have quite a few hands that beat you. Don't think that he has the flush draw as taking the free card or jamming would seem to be the play on the turn.