Tokuichi Sako, 77, was last seen on February 27 at 3pm in the Templeton area.
He was driving a late model white Toyota Hilux Ute, registration JTD982.
Police said they have concerns for the safety and well-being of Mr Sako.
Anyone with information on where Mr Sako may be is urged to call police on 105 and quote file number 200316/2523.