Fuj Fujiyama is somehow alive in this movie despite visibly being shot to death in the first movie by Frank. No explanation is given as to how he survived this.
Jennifer fakes her death and goes by the name "Milena Roberts". She reveals at the end of the movie that her brother is Linton. Linton's mother is Master Kitano. So, this would mean that Jennifer/Milena is Master Kitano's daughter. However, Jennifer has a mother in the first movie and she is most assuredly not Master Kitano.
Furthermore, at the end of the movie Linton rants about killing Jennifer, and that her death haunts his dreams. There is no evidence in the movie that Linton was feeding Joe false information, and thus he truly believes he killed his sister.
Furthermore, at the end of the movie Linton rants about killing Jennifer, and that her death haunts his dreams. There is no evidence in the movie that Linton was feeding Joe false information, and thus he truly believes he killed his sister.
The movie very heavily implies that Peggy's daughter is Joe's. This is not possible. In the first movie, Peggy was assaulted in her home by Yamashita, who poured boiling grease all over her abdomen multiple times. Even if Peggy was pregnant at the time with Joe's child, the trauma and 3rd or 4th degree burns she suffered would have made it to where she never could have given birth. And by the time this home invasion took place, Joe had moved on to Jennifer. Therefore, a pregnancy via Joe wouldn't have happened after this because he married Jennifer and completely disappeared for over two decades after her "murder."
Peggy somehow has top secret information on all the gangs despite clearly not being on the police force anymore.
When Dogge and Joe Marshall met for the first time in the movie, they seem to not know each other, even though in a later scene, she mentions that they were lovers back in Japan.
Master Kitano, played by Beth Johnson, is referred to as a man multiple times.
Joe and Frank have a flashback to a fatal meeting at the beginning of the first film that neither of them witnessed.
Jennifer/Milena concocts a plan to kill the Katana Gang once and for all that takes 25 years to come to fruition, when literally all she had to do was just tell Joe to kill any remaining Katana members and he would have. Furthermore, there was no indication at the end of the first movie that any Katana members had survived in the first place, so her plan was wholly unnecessary from the beginning.
Somehow, Michael Collins, a high-ranking member of Katana, Inc. with considerable power, doesn't know that the girl he is sleeping with is the adopted daughter of one of the highest-ranking of all Katana members.
Gail asks if she needs to send in more "calvary," though she means "cavalry." "Cavalry" is still used to mean reinforcements, even though it really means soldiers on horseback.
The movie reused a old clip from the first movie, in order to make it, look the gangs were meeting up, again, despite some of the characters in the meeting up footage, not being in this film like Yamasita.