When he was last seen he was wearing a black t-shirt with a white hood and "athletic reg no 355 Brooklyn" written on it, black pants and dark canvas shoes.
Mr Kumi has no access to money or cards and is described by police as a fast walker. Previously when he's gone walkabout he was found in Sandringham and at the Auckland Harbour Bridge.
Capella House is run by the Auckland District Health Board and provides 24-hour nursing care.