The Nikkei slid 2 per cent to 14,619.13, its lowest closing level since November 13. The benchmark dropped below its 26-week moving average of 14,833.06.
The Topix shed 2 per cent to 1,196.32, with all of its 33 subsectors in negative territory.
The JPX-Nikkei 400, an index launched this year comprised of firms with high return on equity and strong corporate governance, fell 1.8 per cent to 10,834.99.
Copyright @ Thomson Reuters 2013