 The series was created by the writer and director Shu Takumi , who wanted the series to end after the third game . The series still continued , with Takeshi Yamazaki taking over as writer and director starting with Ace Attorney Investigations : Miles Edgeworth ( 2009 ) ; Takumi has since returned to write and direct some spin @-@ off titles . While the original Japanese versions of the games are set in Japan , the series ' <unk> are set in the United States , though retaining Japanese cultural influence . The series has been well received , with reviewers liking the characters and story , and the finding of contradictions ; it has also performed well commercially , with Capcom regarding it as one of their strongest intellectual properties . 
