According to the tweet of Takeda Yasuhiro (GAINAX’s producer), Kon Satoshi passed away due to pancreatic cancer. He was 46. Mangaka Yuuki Masami also confirmed the news.
According to Cinema Today, MAD HOUSE announced that Kon Satoshi passed away in the early morning of August 24th. He had been working on a new anime “Yume Miru Kikai” (Yume Miru Kikai official website).
Source: Cinema Today
Maruyama Masao, the former president of Madhouse Studios, tweeted on August 24th that a director closely related to the studio had suddently passed away. The tweet has brought about conjectures on who he/she is. Fukuda Noriyuki (general graphic director of “Bakugan Battle Brawlers”) said he had no idea about it. Animator Moritomo Hiroki (“Bokura ga Ita”) said a graphic director who shares a work room with him was talking about the news on the phone.
Sources: Maruyama’s tweet, Fukuda’s tweet, Moritomo’s tweet, Takeda Yasuhiro’s tweet, Yuki Masami’s twitter, GIGAZINE, Natalie