UNOFFICIAL

[adjective] [not gradable] - not official, see at office (RESPONSIBILITY)Unofficial estimates claim Japanese men work a staggering 2 700-3 000 hours a year on average, or around 55 hours a week.There has, according to unofficial figures, been a 51% increase in the numbers of men convicted of minor offences in the last four years.Unofficial reports said the death toll could be much higher.Many newspapers gave evidence of the difficulty in assessing the validity of rumours and the need to rely on unofficial sources.