Probably not bent but very weak refereeing.
Not sure that refereeing in the J League is going to give a referee the experience needed to resist pressure from the big name players, the media attention and partisan home crowd - perhaps a ref who has previous experience / track record at Copa Libertadores or Champions League level would have been a better choice. Although in saying that refs who have experience in those games can have terrible performances too! I hope its not a sign of things to come in the rest of the tournament - in the last world cup Spain were very fortunate in a couple of games when playing "inferior" opposition as a result of decisions given (or not) - weak refereeing can kill the underdogs chances.