Nikkei slips to one-week low, Nintendo slides

Investors avoid taking any risks, Nikkei slips 0.6%

Japan's Nikkei share average slipped to a one-week low on Monday as investors avoided taking risks as the weak-yen trend took a pause, while Nintendo Co Ltd plunged after the game maker forecast an annual loss.

The Nikkei ended 0.6% lower at 15,641.68 after falling as low as 15,574.23, its lowest since January 14. It has fallen for three straight days.

The broader Topix fell 0.3% to 1,293.86 with only 2.2 billion shares changing hands, the lowest since December 17, as trading was subdued with markets closed in the United States for a public holiday.

Nintendo slid as much as 18.5% to 11,935 yen - its lowest since November 8 - before ending down 6.2%. It was the most traded stock by turnover after the "Super Mario" creator said it now expects a full-year loss instead of a profit and slashed its Wii U sales forecast by almost 70%.

The JPX-Nikkei Index 400, a recently introduced gauge comprised of firms with high return on equity and strong corporate governance, shed 0.3% to 11,676.73.