Katsunori Ehara is a games director and designer. Ehara has been working with Sony Interactive Entertainment, Nintendo, Ltd. and Koei Tecmo. Ehara's first game was Ninja Gaiden (1988) published by Tecmo Koei for Nintendo 3DS, Wii U, Wii and NES in 1988. After that, Katsunori Ehara took part as the director of Dead or Alive. Later, Ehara also was part of the team who developed Ninja Gaiden Sigma published by Tecmo Koei for PlayStation 3. Most recently, Katsunori Ehara was involved in the development of Devil's Third.