Voice actor Toshio Furukawa reported that fellow voice actor Takashi Taniguchi passed away on December 28, 2012. Unfortunately, the cause of Taniguchi's death has not been reported.
Taniguchi's roles include Montblanc Cricket and Montblanc Norland in
One Piece, Shigure in
Yu Yu Hakusho, and Hiroki Tsuji in
Case Closed: The Fourteenth Target.
I have posted a
biography for Takashi Taniguchi at the Anime site.