According to a blog post by the theater troupe Seinenza, Dan Tomoyuki, who is best known for voicing Asher Chronicle in MS Victory Gundam and Hoshigaki Kisame in Naruto, passed away on October 10th at the age of 50 due to a relapse of aortic dissection. He is survived by his wife and son. Dan Tomoyuki started acting in TV dramas in the '80s and undertook a broad range of activities ranging from acting on stage to voice acting for western movies and games. He made debut as a seiyuu in Victory Gundam and followed up with voicing various supporting roles until this year. His last work in anime is Genei wo Kakeru Taiyou, in which he played Honda Koujirou, a company president fallen on hard times.

Source: Seinenza Blog