According to 1UP who received an official letter from one of Itagaki's aids, Itagaki reveals that he is suing Tecmo for 145 million yen due to "unpaid completion bonuses" and because Itagaki claims that there were "unreasonable and disingenuous statements made towards me" by Tecmo's president Yoshimi Yasuda which caused "significant emotional distress." The letter goes on to say that the lawsuit is based on a "strong intent to question the social responsibility of Tecmo Co., Ltd." and that Itagaki will resign from Tecmo effective July 1st. Ending his letter, Itagaki addresses his fans, saying that Ninja Gaiden II "will be the last Ninja Gaiden I will create", mentions that he will never "be able to make Dead or Alive 5" and, for that, Itagaki regrets "the disappointment this will cause" those who have enjoyed his work.
Wow ... we're speechless. Itagaki leaves Team Ninja, leaves behind franchises that he helped bring to life and leaves both his fans and the industry, well ... speechless. We can only assume that Itagaki's battle with Tecmo will be hard fought and is going to get very, very ugly.