Sad news... I'm sure more than one of us as kids enjoyed Araki's work on more than a few Go Nagai series http://en.wikipedia.org/wiki/Shingo_Araki
Oh no! This is the greatest loss in the world of animation since Satoshi Kon! At least Shingo-san lived to a nice long life. Still so sad to hear.
This is really sad news. I think I speak for a lot of people when I say that it was brilliant pioneering animators like Araki-san who brought their craft over to western audiences that really influenced us growing up, and the genre as a whole. Creativity like his will be missed. RIP Shingo.