Gen Urobuchi (虚淵 玄, Urobuchi Gen) is a Japanese writer. Like Yoshiyuki Tomino, he is known for his dark endings and killing off characters, this has earned him the fan nickname "Urobutcher." Gen Urobuchi currently works at Nitroplus.
Notable works he has written include the 2003 visual novel Saya no Uta, the 2011 Magical girl anime Puella Magi Madoka Magica, the light novel Fate/Zero, the 2013 mecha anime Gargantia on the Verdurous Planet and the 2014 mecha anime ALDNOAH.ZERO. He has even written Tokusatsu such as the 2013–2014 Kamen Rider Series Kamen Rider Gaim.