
Jan 23 (Reuters) - The yen jumped suddenly against the dollar on Friday, putting traders on alert to the prospect of intervention from Tokyo to stem the Japanese currency's slide to/towards multi-year lows.
The dollar was last down 0.3% on the yenJPY=, trading at 158.03. It was earlier up around 0.5%.
It was not immediately clear what was behind the move, and whether Japanese authorities had kicked off yen-buying intervention.
Japan's Ministry of Finance (MOF) was not immediately available for comment when contacted by Reuters.