A popular and commonly discussed feature, one credited to Tomonobu Itagaki, was the level of graphical detail Tecmo put into the animated breasts of the female characters, as Tecmo went so far as to create a physics engine dedicated entirely to the animation of the female characters' breasts.
In an interview with Famitsu Xbox, Tomonobu Itagaki remarked that he spent 99% of his time developing the game, while only sleeping 40 minutes in four days.
This disc also included a G4-produced segment from their Icons series detailing the history of the Dead or Alive series, along with interviews featuring various people from the video game industry, including series creator Tomonobu Itagaki.
The title was developed over five years by developer Tomonobu Itagaki and his Team Ninja, and eventually released to high sales and critical acclaim.
Though Team Ninja developed the title, the series' creator Tomonobu Itagaki did not design it, as he left Team Ninja after completing Ninja Gaiden II.
Ninja Gaiden series director Tomonobu Itagaki has stated that he decided to make the game for the Nintendo DS because of the originality that the platform allows, which he feels is the most important aspect of a handheld platform, and also to create a challenge for himself.
Tomonobu Itagaki, the creator of the Dead or Alive series, included a jet-ski mode on the game Dead or Alive Xtreme 2 because he is a great fan of Wave Race 64.
Tomonobu Itagaki | Itagaki Taisuke | Keisuke Itagaki | SeishirÅ Itagaki | '''Jinshotai'''(From the left in the bottom row: Ban Gondayu, Itagaki Taisuke |